Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
When Acidic Slime enters the battlefield, destroy target artifact, enchantment, or land.
2 /
2
{G}
Arbor Elf
Creature - Elf Druid
{T}: Untap target Forest.
1 /
1
{X}{B}
Battle at the Bridge
Sorcery
Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)
Target creature gets -X/-X until end of turn. You gain X life.
{5}{G}
Briar Hydra
Creature - Plant Hydra
Trample
Domain -- Whenever Briar Hydra deals combat damage to a player, put X +1/+1 counters on target creature you control, where X is the number of basic land types among lands you control.
6 /
6
{X}
Briber's Purse
Artifact
Briber's Purse enters the battlefield with X gem counters on it.
{1}, {T}, Remove a gem counter from Briber's Purse: Target creature can't attack or block this turn.
{1}{G}
Cankerbloom
Creature - Phyrexian Fungus
{1}, Sacrifice Cankerbloom: Choose one --
• Destroy target artifact.
• Destroy target enchantment.
• Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
3 /
2
{X}{G}
Capricopian
Creature - Goat Hydra
Capricopian enters the battlefield with X +1/+1 counters on it.
{2}: Put a +1/+1 counter on Capricopian, then you may reselect which player Capricopian is attacking. Only the player Capricopian is attacking may activate this ability and only during the declare attackers step. (It can't attack its controller.)
0 /
0
{X}
Chimeric Mass
Artifact
Chimeric Mass enters the battlefield with X charge counters on it.
{1}: Until end of turn, Chimeric Mass becomes a Construct artifact creature with "This creature's power and toughness are each equal to the number of charge counters on it."
{5}
Clockwork Hydra
Artifact Creature - Hydra
Clockwork Hydra enters the battlefield with four +1/+1 counters on it.
Whenever Clockwork Hydra attacks or blocks, remove a +1/+1 counter from it. If you do, Clockwork Hydra deals 1 damage to any target.
{T}: Put a +1/+1 counter on Clockwork Hydra.
0 /
0
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{X}{G}
Contortionist Troupe
Creature - Human
Contortionist Troupe enters the battlefield with X +1/+1 counters on it.
Coven -- At the beginning of your end step, if you control three or more creatures with different powers, put a +1/+1 counter on target creature you control.
0 /
0
{X}{B}{B}
Cut of the Profits
Sorcery
Casualty 3 (As you cast this spell, you may sacrifice a creature with power 3 or greater. When you do, copy this spell.)
You draw X cards and you lose X life.
{X}{B}{B}
Damnable Pact
Sorcery
Target player draws X cards and loses X life.
{X}{B}{B}
Death Denied
Instant - Arcane
Return X target creature cards from your graveyard to your hand.
{X}{B}
Death Wind
Instant
Target creature gets -X/-X until end of turn.
{3}
Dimir Locket
Artifact
{T}: Add {U} or {B}.
{U/B}{U/B}{U/B}{U/B}, {T}, Sacrifice Dimir Locket: Draw two cards.
{2}{G}{G}
Domesticated Hydra
Creature - Hydra
{X}{G}{G}{G}: Monstrosity X. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.)
As long as Domesticated Hydra is monstrous, it has trample.
3 /
3
--
Dreadship Reef
Land
{T}: Add {C}.
{1}, {T}: Put a storage counter on Dreadship Reef.
{1}, Remove X storage counters from Dreadship Reef: Add X mana in any combination of {U} and/or {B}.
{X}
Endless One
Creature - Eldrazi
Endless One enters the battlefield with X +1/+1 counters on it.
0 /
0
{X}{B}
Endless Scream
Enchantment - Aura
Enchant creature
Endless Scream enters the battlefield with X scream counters on it.
Enchanted creature gets +1/+0 for each scream counter on Endless Scream.
{X}{U}
Epiphany at the Drownyard
Instant
Reveal the top X plus one cards of your library and separate them into two piles. An opponent chooses one of those piles. Put that pile into your hand and the other into your graveyard.
{X}{X}{G}{G}
Exponential Growth
Sorcery
Until end of turn, double target creature's power X times.
{X}{G}
Feral Hydra
Creature - Hydra Beast
Feral Hydra enters the battlefield with X +1/+1 counters on it.
{3}: Put a +1/+1 counter on Feral Hydra. Any player may activate this ability.
0 /
0
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
{X}{B}
Gang Up
Instant
Assist (Another player can pay up to {X} of this spell's cost. You choose the value of X.)
Destroy target creature with power X or less.
{X}{X}{G}
Gelatinous Genesis
Sorcery
Create X X/X green Ooze creature tokens.
{X}{G}{G}
Genesis Hydra
Creature - Plant Hydra
When you cast this spell, reveal the top X cards of your library. You may put a nonland permanent card with mana value X or less from among them onto the battlefield. Then shuffle the rest into your library.
Genesis Hydra enters the battlefield with X +1/+1 counters on it.
0 /
0
{3}
Golgari Locket
Artifact
{T}: Add {B} or {G}.
{B/G}{B/G}{B/G}{B/G}, {T}, Sacrifice Golgari Locket: Draw two cards.
{X}{U}
Gridlock
Instant
Tap X target nonland permanents.
{3}{G}{G}
Heroes' Bane
Creature - Hydra
Heroes' Bane enters the battlefield with four +1/+1 counters on it.
{2}{G}{G}: Put X +1/+1 counters on Heroes' Bane, where X is its power.
0 /
0
{5}{G}
Honored Hydra
Creature - Snake Hydra
Trample
Embalm {3}{G} ({3}{G}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a white Zombie Snake Hydra with no mana cost. Embalm only as a sorcery.)
6 /
6
{4}{G}{G}
Hydra Broodmaster
Creature - Hydra
{X}{X}{G}: Monstrosity X. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.)
When Hydra Broodmaster becomes monstrous, create X X/X green Hydra creature tokens.
7 /
7
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
{X}{G}
Ivy Elemental
Creature - Elemental
Ivy Elemental enters the battlefield with X +1/+1 counters on it.
0 /
0
{3}{G}
Karametra's Acolyte
Creature - Human Druid
{T}: Add an amount of {G} equal to your devotion to green. (Each {G} in the mana costs of permanents you control counts toward your devotion to green.)
1 /
4
{X}{B}
Killing Glare
Instant
Destroy target creature with power X or less.
{X}{G}{G}
Krakilin
Creature - Beast
Krakilin enters the battlefield with X +1/+1 counters on it.
{1}{G}: Regenerate Krakilin.
0 /
0
{G}
Llanowar Elves
Creature - Elf Druid
{T}: Add {G}.
1 /
1
{G}{G}{G}
Llanowar Tribe
Creature - Elf Druid
{T}: Add {G}{G}{G}.
3 /
3
{X}{G}
Luxurious Libation
Instant
Target creature gets +X/+X until end of turn. Create a 1/1 green and white Citizen creature token.
{X}{G}
Mana Bloom
Enchantment
Mana Bloom enters the battlefield with X charge counters on it.
Remove a charge counter from Mana Bloom: Add one mana of any color. Activate only once each turn.
At the beginning of your upkeep, if Mana Bloom has no charge counters on it, return it to its owner's hand.
{X}{G}
Mistcutter Hydra
Creature - Hydra
This spell can't be countered.
Haste, protection from blue
Mistcutter Hydra enters the battlefield with X +1/+1 counters on it.
0 /
0
{X}{G}
Molder
Instant
Destroy target artifact or enchantment with mana value X. It can't be regenerated. You gain X life.
{X}{U}
Multiple Choice
Sorcery
If X is 1, scry 1, then draw a card.
If X is 2, you may choose a player. They return a creature they control to its owner's hand.
If X is 3, create a 4/4 blue and red Elemental creature token.
If X is 4 or more, do all of the above.
--
Myriad Landscape
Land
Myriad Landscape enters the battlefield tapped.
{T}: Add {C}.
{2}, {T}, Sacrifice Myriad Landscape: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.
{4}{G}{G}
Nessian Wilds Ravager
Creature - Hydra
Tribute 6 (As this creature enters the battlefield, an opponent of your choice may put six +1/+1 counters on it.)
When Nessian Wilds Ravager enters the battlefield, if tribute wasn't paid, you may have Nessian Wilds Ravager fight another target creature. (Each deals damage equal to its power to the other.)
6 /
6
{X}{G}
Ochre Jelly
Creature - Ooze
Trample
Ochre Jelly enters the battlefield with X +1/+1 counters on it.
Split -- When Ochre Jelly dies, if it had two or more +1/+1 counters on it, create a token that's a copy of it at the beginning of the next end step. The token enters the battlefield with half that many +1/+1 counters on it, rounded down.
0 /
0
--
Opulent Palace
Land
Opulent Palace enters the battlefield tapped.
{T}: Add {B}, {G}, or {U}.
{4}{G}{G}
Oran-Rief Hydra
Creature - Hydra
Trample
Landfall -- Whenever a land enters the battlefield under your control, put a +1/+1 counter on Oran-Rief Hydra. If that land is a Forest, put two +1/+1 counters on Oran-Rief Hydra instead.
5 /
5
{2}{G}{G}
Polukranos, World Eater
Legendary Creature - Hydra
{X}{X}{G}: Monstrosity X. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.)
When Polukranos, World Eater becomes monstrous, it deals X damage divided as you choose among any number of target creatures your opponents control. Each of those creatures deals damage equal to its power to Polukranos.
5 /
5
{X}{B}{B}
Profane Command
Sorcery
Choose two --
• Target player loses X life.
• Return target creature card with mana value X or less from your graveyard to the battlefield.
• Target creature gets -X/-X until end of turn.
• Up to X target creatures gain fear until end of turn. (They can't be blocked except by artifact creatures and/or black creatures.)
{X}{U}{U}
Pull from Tomorrow
Instant
Draw X cards, then discard a card.
{X}{G}
Serene Sunset
Instant
Prevent all combat damage X target creatures would deal this turn.
{X}{B}{B}
Shattered Crypt
Sorcery
Return X target creature cards from your graveyard to your hand. You lose X life.
{X}{U}{U}
Silver Scrutiny
Sorcery
You may cast Silver Scrutiny as though it had flash if X is 3 or less.
Draw X cards.
{X}{B}
Skeletal Scrying
Instant
As an additional cost to cast this spell, exile X cards from your graveyard.
You draw X cards and you lose X life.
{X}{G}
Slime Molding
Sorcery
Create an X/X green Ooze creature token.
{X}{U}
Spell Burst
Instant
Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Counter target spell with mana value X.
{X}{B}
Stir the Grave
Sorcery
Return target creature card with mana value X or less from your graveyard to the battlefield.
{X}{U}{U}
Stolen by the Fae
Sorcery
Return target creature with mana value X to its owner's hand. You create X 1/1 blue Faerie creature tokens with flying.
{X}{G}{G}{G}
Stumpsquall Hydra
Creature - Hydra
When Stumpsquall Hydra enters the battlefield, distribute X +1/+1 counters among it and any number of commanders.
1 /
1
{X}{B}{B}
Swallowing Plague
Sorcery - Arcane
Swallowing Plague deals X damage to target creature and you gain X life.
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Temple of Malady
Land
Temple of Malady enters the battlefield tapped.
When Temple of Malady enters the battlefield, scry 1.
{T}: Add {B} or {G}.
--
Temple of Mystery
Land
Temple of Mystery enters the battlefield tapped.
When Temple of Mystery enters the battlefield, scry 1.
{T}: Add {G} or {U}.
{X}{U}{U}
Thassa's Intervention
Instant
Choose one --
• Look at the top X cards of your library. Put up to two of them into your hand and the rest on the bottom of your library in a random order.
• Counter target spell unless its controller pays twice {X}.
{X}{G}
Thrive
Sorcery
Put a +1/+1 counter on each of X target creatures.
--
Thriving Grove
Land
Thriving Grove enters the battlefield tapped.
As Thriving Grove enters the battlefield, choose a color other than green.
{T}: Add {G} or one mana of the chosen color.
--
Thriving Isle
Land
Thriving Isle enters the battlefield tapped.
As Thriving Isle enters the battlefield, choose a color other than blue.
{T}: Add {U} or one mana of the chosen color.
--
Thriving Moor
Land
Thriving Moor enters the battlefield tapped.
As Thriving Moor enters the battlefield, choose a color other than black.
{T}: Add {B} or one mana of the chosen color.
{X}{G}
Untamed Might
Instant
Target creature gets +X/+X until end of turn.
{X}{G}{G}
Vastwood Hydra
Creature - Hydra
Vastwood Hydra enters the battlefield with X +1/+1 counters on it.
When Vastwood Hydra dies, you may distribute a number of +1/+1 counters equal to the number of +1/+1 counters on Vastwood Hydra among any number of creatures you control.
0 /
0
{X}{U}
Venarian Glimmer
Instant
Target player reveals their hand. You choose a nonland card with mana value X or less from it. That player discards that card.
{X}{G}
Wildwood Scourge
Creature - Hydra
Wildwood Scourge enters the battlefield with X +1/+1 counters on it.
Whenever one or more +1/+1 counters are put on another non-Hydra creature you control, put a +1/+1 counter on Wildwood Scourge.
0 /
0
{X}{B}{B}
Word of Binding
Sorcery
Tap X target creatures.
{X}{G}
Wren's Run Hydra
Creature - Hydra
Reach
Wren's Run Hydra enters the battlefield with X +1/+1 counters on it.
Reinforce X--{X}{G}{G} ({X}{G}{G}, Discard this card: Put X +1/+1 counters on target creature.)
0 /
0
{1}{B}{G}{U}
Zaxara, the Exemplary
Legendary Creature - Nightmare Hydra
Deathtouch
{T}: Add two mana of any one color.
Whenever you cast a spell with {X} in its mana cost, create a 0/0 green Hydra creature token, then put X +1/+1 counters on it.