Return target creature to its owner's hand. Create X 1/1 green Saproling creature tokens, where X is that creature's mana value.
{1}{U}
Amoeboid Changeling
Creature - Shapeshifter
Changeling (This card is every creature type.)
{T}: Target creature gains all creature types until end of turn.
{T}: Target creature loses all creature types until end of turn.
1 /
1
{4}{U}{U}
Archetype of Imagination
Enchantment Creature - Human Wizard
Creatures you control have flying.
Creatures your opponents control lose flying and can't have or gain flying.
3 /
2
{X}{G/U}{G/U}
Biomass Mutation
Instant
Creatures you control have base power and toughness X/X until end of turn.
{2}{G}
Blanchwood Armor
Enchantment - Aura
Enchant creature
Enchanted creature gets +1/+1 for each Forest you control.
{1}{G}
Blanchwood Prowler
Creature - Elemental
When Blanchwood Prowler enters the battlefield, mill three cards. You may put a land card from among the cards milled this way into your hand. If you don't, put a +1/+1 counter on Blanchwood Prowler. (To mill a card, put the top card of your library into your graveyard.)
1 /
1
{6}
Brass Herald
Artifact Creature - Golem
As Brass Herald enters the battlefield, choose a creature type.
When Brass Herald enters the battlefield, reveal the top four cards of your library. Put all creature cards of the chosen type revealed this way into your hand and the rest on the bottom of your library in any order.
Creatures of the chosen type get +1/+1.
2 /
2
{2}{G}
Carnivorous Canopy
Sorcery
Destroy target artifact, enchantment, or creature with flying. If that permanent's mana value was 3 or less, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
{1}{G}{G}
Champion of Lambholt
Creature - Human Warrior
Creatures with power less than Champion of Lambholt's power can't block creatures you control.
Whenever another creature enters the battlefield under your control, put a +1/+1 counter on Champion of Lambholt.
1 /
1
{1}{U}
Cloak of Mists
Enchantment - Aura
Enchant creature
Enchanted creature can't be blocked.
{2}
Cloak of the Bat
Artifact - Equipment
Equipped creature has flying and haste.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)
{2}{G}
Crawling Infestation
Enchantment
At the beginning of your upkeep, you may mill two cards. (You may put the top two cards of your library into your graveyard.)
Whenever one or more creature cards are put into your graveyard from anywhere during your turn, create a 1/1 green Insect creature token. This ability triggers only once each turn.
{2}{G}
Crawling Sensation
Enchantment
At the beginning of your upkeep, you may mill two cards.
Whenever one or more land cards are put into your graveyard from anywhere for the first time each turn, create a 1/1 green Insect creature token.
{1}{G}{U}
Croaking Counterpart
Sorcery
Create a token that's a copy of target non-Frog creature, except it's a 1/1 green Frog.
Flashback {3}{G}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{2}{G}
Crocanura
Creature - Crocodile Frog
Reach (This creature can block creatures with flying.)
Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
1 /
3
{1}{U}
Deranged Assistant
Creature - Human Wizard
{T}, Mill a card: Add {C}. (To mill a card, put the top card of your library into your graveyard.)
1 /
1
{2}{U}{U}
Dreamborn Muse
Creature - Spirit
At the beginning of each player's upkeep, that player mills X cards, where X is the number of cards in their hand.
2 /
2
{5}{U}{U}
Fleet Swallower
Creature - Fish
Whenever Fleet Swallower attacks, target player mills half their library, rounded up.
6 /
6
{3}{G}{G}
Froghemoth
Creature - Frog Horror
Trample, haste
Whenever Froghemoth deals combat damage to a player, exile up to that many target cards from their graveyard. Put a +1/+1 counter on Froghemoth for each creature card exiled this way. You gain 1 life for each noncreature card exiled this way.
4 /
4
{1}{U}
Frogify
Enchantment - Aura
Enchant creature
Enchanted creature loses all abilities and is a blue Frog creature with base power and toughness 1/1. (It loses all other card types and creature types.)
{2}{G}{U}
Grolnok, the Omnivore
Legendary Creature - Frog
Whenever a Frog you control attacks, mill three cards.
Whenever a permanent card is put into your graveyard from your library, exile it with a croak counter on it.
You may play lands and cast spells from among cards you own in exile with croak counters on them.
3 /
3
{1}{U}{U}{U}
Jace, Wielder of Mysteries
Legendary Planeswalker - Jace
If you would draw a card while your library has no cards in it, you win the game instead.
+1: Target player mills two cards. Draw a card.
-8: Draw seven cards. Then if your library has no cards in it, you win the game.
L:
4
{1}{G}
Jade Avenger
Creature - Frog Samurai
Bushido 2 (Whenever this creature blocks or becomes blocked, it gets +2/+2 until end of turn.)
2 /
2
{4}{G}
Loyal Guardian
Creature - Rhino
Trample
Lieutenant -- At the beginning of combat on your turn, if you control your commander, put a +1/+1 counter on each creature you control.
4 /
4
{2}{U}
Mass Appeal
Sorcery
Draw a card for each Human you control.
{2}{G/U}{G/U}{G/U}
Murkfiend Liege
Creature - Horror
Other green creatures you control get +1/+1.
Other blue creatures you control get +1/+1.
Untap all green and/or blue creatures you control during each other player's untap step.
4 /
4
{1}{G}{G}{U}
Omnibian
Creature - Frog
{T}: Target creature becomes a Frog with base power and toughness 3/3 until end of turn.
3 /
3
{2}{G}{G}{G}
Overrun
Sorcery
Creatures you control get +3/+3 and gain trample until end of turn.
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{G}{U}
Plaxcaster Frogling
Creature - Frog Mutant
Graft 3 (This creature enters the battlefield with three +1/+1 counters on it. Whenever another creature enters the battlefield, you may move a +1/+1 counter from this creature onto it.)
{2}: Target creature with a +1/+1 counter on it gains shroud until end of turn. (It can't be the target of spells or abilities.)
0 /
0
{4}{U}
Reflections of Littjara
Enchantment
As Reflections of Littjara enters the battlefield, choose a creature type.
Whenever you cast a spell of the chosen type, copy that spell. (A copy of a permanent spell becomes a token.)
{3}
Rhonas's Monument
Legendary Artifact
Green creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, target creature you control gets +2/+2 and gains trample until end of turn.
{5}{U}{U}
Sage of the Beyond
Creature - Spirit Giant
Flying
Spells you cast from anywhere other than your hand cost {2} less to cast.
Foretell {4}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
5 /
5
{2}{G/U}
Shielding Plax
Enchantment - Aura
({G/U} can be paid with either {G} or {U}.)
Enchant creature
When Shielding Plax enters the battlefield, draw a card.
Enchanted creature can't be the target of spells or abilities your opponents control.
{1}
Skeleton Key
Artifact - Equipment
Equipped creature has skulk. (It can't be blocked by creatures with greater power.)
Whenever equipped creature deals combat damage to a player, you may draw a card. If you do, discard a card.
Equip {2}
{1}{G}{U}
Slogurk, the Overslime
Legendary Creature - Ooze
Trample
Whenever a land card is put into your graveyard from anywhere, put a +1/+1 counter on Slogurk, the Overslime.
Remove three +1/+1 counters from Slogurk: Return it to its owner's hand.
When Slogurk leaves the battlefield, return up to three target land cards from your graveyard to your hand.
3 /
3
{5}{G}{G}
Spearbreaker Behemoth
Creature - Beast
Indestructible
{1}: Target creature with power 5 or greater gains indestructible until end of turn.
5 /
5
{G}
Spore Frog
Creature - Frog
Sacrifice Spore Frog: Prevent all combat damage that would be dealt this turn.
1 /
1
{2}
Swiftfoot Boots
Artifact - Equipment
Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)
Equip {1}
{4}{U}
Switcheroo
Sorcery
Exchange control of two target creatures.
{2}{G}{U}
Tamiyo, Collector of Tales
Legendary Planeswalker - Tamiyo
Spells and abilities your opponents control can't cause you to discard cards or sacrifice permanents.
+1: Choose a nonland card name, then reveal the top four cards of your library. Put all cards with the chosen name from among them into your hand and the rest into your graveyard.
-3: Return target card from your graveyard to your hand.
L:
5
--
Tangled Islet
Land - Forest Island
({T}: Add {G} or {U}.)
Tangled Islet enters the battlefield tapped.
{3}{G}{U}
Tatyova, Benthic Druid
Legendary Creature - Merfolk Druid
Landfall -- Whenever a land enters the battlefield under your control, you gain 1 life and draw a card.
3 /
3
{1}{U}
Turn to Frog
Instant
Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1.
{2}
Vorrac Battlehorns
Artifact - Equipment
Equipped creature has trample and can't be blocked by more than one creature.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)
{G}
Willow Geist
Creature - Treefolk Spirit
Trample
Whenever one or more cards leave your graveyard, put a +1/+1 counter on Willow Geist.
When Willow Geist dies, you gain life equal to its power.
1 /
1
{G}{U}
Wood Sage
Creature - Human Druid
{T}: Choose a creature card name. Reveal the top four cards of your library and put all of them with that name into your hand. Put the rest into your graveyard.
1 /
1
--
Woodland Stream
Land
Woodland Stream enters the battlefield tapped.
{T}: Add {G} or {U}.
{2}{U}
Arcane Adaptation
Enchantment
As Arcane Adaptation enters the battlefield, choose a creature type.
Creatures you control are the chosen type in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.
{2}{G}
Azusa, Lost but Seeking
Legendary Creature - Human Monk
You may play two additional lands on each of your turns.
1 /
2
{2}{G}
Beastmaster Ascension
Enchantment
Whenever a creature you control attacks, you may put a quest counter on Beastmaster Ascension.
As long as Beastmaster Ascension has seven or more quest counters on it, creatures you control get +5/+5.
{3}
Desecrated Tomb
Artifact
Whenever one or more creature cards leave your graveyard, create a 1/1 black Bat creature token with flying.
{4}
Door of Destinies
Artifact
As Door of Destinies enters the battlefield, choose a creature type.
Whenever you cast a spell of the chosen type, put a charge counter on Door of Destinies.
Creatures you control of the chosen type get +1/+1 for each charge counter on Door of Destinies.
{1}{G/U}
Favor of the Overbeing
Enchantment - Aura
Enchant creature
As long as enchanted creature is green, it gets +1/+1 and has vigilance.
As long as enchanted creature is blue, it gets +1/+1 and has flying.
{2}{G}
Guardian Augmenter
Creature - Troll Wizard
Flash
Commander creatures you control get +2/+2.
Commanders you control have hexproof.
2 /
2
{U}
Hedron Crab
Creature - Crab
Landfall -- Whenever a land enters the battlefield under your control, target player mills three cards.
0 /
2
{2}{G}
Heronblade Elite
Creature - Human Warrior
Vigilance
Whenever another Human enters the battlefield under your control, put a +1/+1 counter on Heronblade Elite.
{T}: Add X mana of any one color, where X is Heronblade Elite's power.
1 /
1
{2}
Lightning Greaves
Artifact - Equipment
Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip {0}
{4}
Maskwood Nexus
Artifact
Creatures you control are every creature type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.
{3}, {T}: Create a 2/2 blue Shapeshifter creature token with changeling. (It is every creature type.)
{3}{G}
Oracle of Mul Daya
Creature - Elf Shaman
You may play an additional land on each of your turns.
Play with the top card of your library revealed.
You may play lands from the top of your library.
2 /
2
{3}{U}
Peer Pressure
Sorcery
Choose a creature type. If you control more creatures of that type than each other player, you gain control of all creatures of that type. (This effect lasts indefinitely.)
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}
Persistent Petitioners
Creature - Human Advisor
{1}, {T}: Target player mills a card.
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.
1 /
3
{1}{U}{U}
Polymorphist's Jest
Instant
Until end of turn, each creature target player controls loses all abilities and becomes a blue Frog with base power and toughness 1/1.
{U}
Rapid Hybridization
Instant
Destroy target creature. It can't be regenerated. That creature's controller creates a 3/3 green Frog Lizard creature token.
{2}{G}{G}
Saryth, the Viper's Fang
Legendary Creature - Human Warlock
Other tapped creatures you control have deathtouch.
Other untapped creatures you control have hexproof.
{1}, {T}: Untap another target creature or land you control.
3 /
4
{2}{G}
Scute Swarm
Creature - Insect
Landfall -- Whenever a land enters the battlefield under your control, create a 1/1 green Insect creature token. If you control six or more lands, create a token that's a copy of Scute Swarm instead.
1 /
1
{2}{B}{B}
Species Specialist
Creature - Human Warrior
As Species Specialist enters the battlefield, choose a creature type.
Whenever a creature of the chosen type dies, you may draw a card.
2 /
3
{3}{U}{U}
Traumatize
Sorcery
Target player mills half their library, rounded down.
{2}{G}{G}
Triumph of the Hordes
Sorcery
Until end of turn, creatures you control get +1/+1 and gain trample and infect. (Creatures with infect deal damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
{3}
Whispersilk Cloak
Artifact - Equipment
Equipped creature can't be blocked and has shroud. (It can't be the target of spells or abilities.)
Equip {2}
{2}{U}
Zellix, Sanity Flayer
Legendary Creature - Horror
Hive Mind -- Whenever a player mills one or more creature cards, you create a 1/1 black Horror creature token.
{1}, {T}: Target player mills three cards.
Choose a Background (You can have a Background as a second commander.)