This spell can't be countered.

Green spells you control can't be countered.

{4}{G}{G}: Until end of turn, each Elf creature you control has base power and toughness 5/5 and becomes a Dinosaur in addition to its other creature types.

{T}: Add {C}{C}. Ancient Tomb deals 2 damage to you.

{T}: Add one mana of any color in your commander's color identity.

({T}: Add {B} or {G}.)

Destroy target permanent. Its controller creates a 3/3 green Beast creature token.

Blooming Marsh enters the battlefield tapped unless you control two or fewer other lands.

{T}: Add {B} or {G}.

Bojuka Bog enters tapped.

When Bojuka Bog enters, exile target player's graveyard.

{T}: Add {B}.

If one or more +1/+1 counters would be put on a creature you control, twice that many +1/+1 counters are put on that creature instead.

Other Elves you control get +1/+1.

{T}: Add {G}{G}{G}.

{T}: Add one mana of any color in your commander's color identity.

Choose a creature type. Creatures that aren't of the chosen type get -3/-3 until end of turn.

Enchant creature

Enchanted creature gets +1/+1 for each Elf you control and has reach.

{2}{G}: Return Crown of Skemfar from your graveyard to your hand.

Creatures you control have "{T}: Add one mana of any color."

Deathcap Glade enters the battlefield tapped unless you control two or more other lands.

{T}: Add {B} or {G}.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.

Reach

Other Elf creatures you control get +1/+1.

Whenever Dwynen, Gilt-Leaf Daen attacks, you gain 1 life for each attacking Elf you control.

Attacking Elves you control have deathtouch.

Whenever an Elf you control dies, each opponent loses 1 life and you gain 1 life.

Create a 1/1 green Elf Warrior creature token for each Elf you control.

When Elven Bow enters, you may pay {2}. If you do, create a 1/1 green Elf Warrior creature token, then attach Elven Bow to it.

Equipped creature gets +1/+2 and has reach.

Equip {3}

Other Elf creatures you control get +1/+1.

{T}: Add {G} for each Elf you control.

Other Elf creatures get +1/+1 and have forestwalk. (They can't be blocked as long as defending player controls a Forest.)

Create a 1/1 green Elf Warrior creature token for each Elf you control.

Whenever one or more other Elves enter the battlefield under your control, create a 1/1 green Elf Warrior creature token. This ability triggers only once each turn.

{5}{G}{G}: Elves you control get +2/+2 and gain deathtouch until end of turn.

Non-Elf creatures get -2/-2 until end of turn.

Destroy target non-Elf creature.

{G}: Regenerate another target Elf.

{2}{G}{G}{G}: Elf creatures you control get +3/+3 and gain trample until end of turn.

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

{T}: Add {G}.

Create X 1/1 green Elf Warrior creature tokens, where X is the number of attacking creatures.

Prevent all combat damage that would be dealt this turn by non-Elf creatures.

Golgari Rot Farm enters tapped.

When Golgari Rot Farm enters, return a land you control to its owner's hand.

{T}: Add {B}{G}.

Whenever a nontoken creature enters the battlefield under your control, if it doesn't have the same name as another creature you control or a creature card in your graveyard, draw a card.

If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead.

{T}: Draw a card. Activate only if you created a token this turn.

{8}, {T}, Sacrifice Idol of Oblivion: Create a 10/10 colorless Eldrazi creature token.

{T}: Put a +1/+1 counter on target creature for each Elf you control.

Other Elves you control get +1/+1.

{G}, {T}: Create a 1/1 green Elf Warrior creature token.

Destroy target creature. You lose 2 life.

Tokens you control have "{T}: Add {G}."

Choose a Background (You can have a Background as a second commander.)

Multikicker {1}{G} (You may pay an additional {1}{G} any number of times as you cast this spell.)

Joraga Warcaller enters the battlefield with a +1/+1 counter on it for each time it was kicked.

Other Elf creatures you control get +1/+1 for each +1/+1 counter on Joraga Warcaller.

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)

Destroy target artifact or enchantment.

Menace

Whenever Lathril, Blade of the Elves deals combat damage to a player, create that many 1/1 green Elf Warrior creature tokens.

{T}, Tap ten untapped Elves you control: Each opponent loses 10 life and you gain 10 life.

Other Elves you control get +1/+1.

Whenever you cast an Elf spell, you may pay {G}. If you do, draw a card.

Enchant legendary creature

Enchanted creature has ward {2} and "{T}: Add five mana in any combination of colors. Spend this mana only to cast spells."

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)

Equip {0}

{T}: Add {G}.

Whenever you cast an Elf spell, you may create a 1/1 green Elf Warrior creature token.

Destroy target nonland permanent and all other permanents with the same name as that permanent.

Whenever another Elf enters the battlefield under your control, put a +1/+1 counter on Marwyn, the Nurturer.

{T}: Add an amount of {G} equal to Marwyn's power.

Whenever a creature you control dies, you gain 1 life and draw a card.

This spell costs {2} less to cast if you gained life this turn.

Destroy target nonland permanent.

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)

Mosswort Bridge enters tapped.

{T}: Add {G}.

{G}, {T}: You may play the exiled card without paying its mana cost if creatures you control have total power 10 or greater.

Whenever a token you control leaves the battlefield, each opponent loses 1 life and you gain 1 life.

Destroy target artifact or enchantment. Its controller gains 4 life.

Tap four untapped creatures you control: Destroy target artifact or enchantment.

{T}: Add {C}.

{2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

{T}: Add {G}.

{G}, {T}: Target legendary creature gets +1/+1 until end of turn.

Oran-Rief, the Vastwood enters tapped.

{T}: Add {G}.

{T}: Put a +1/+1 counter on each green creature that entered this turn.

({T}: Add {B} or {G}.)

As Overgrown Tomb enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Until end of turn, creatures you control gain trample and get +X/+X, where X is the greatest power among creatures you control.

If one or more +1/+1 counters would be put on an artifact or creature you control, that many plus one +1/+1 counters are put on it instead.

{1}{G}, {T}: Put a +1/+1 counter on target artifact or creature you control. Activate only as a sorcery.

Cycling {2} ({2}, Discard this card: Draw a card.)

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

Path of Ancestry enters tapped.

{T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Destroy target artifact or creature. It can't be regenerated.

Equipped creature gets +2/+1 and has reach.

Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)

Return target creature card from your graveyard to the battlefield. If it's an Elf, create two 1/1 green Elf Warrior creature tokens.

Foretell {3}{B} (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.)

Whenever Rhys the Exiled attacks, you gain 1 life for each Elf you control.

{B}, Sacrifice an Elf: Regenerate Rhys the Exiled.

When Rishkar, Peema Renegade enters, put a +1/+1 counter on each of up to two target creatures.

Each creature you control with a counter on it has "{T}: Add {G}."

When Riveteers Overlook enters the battlefield, sacrifice it. When you do, search your library for a basic Swamp, Mountain, or Forest card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

Ward {2}

As Roaming Throne enters the battlefield, choose a creature type.

Roaming Throne is the chosen type in addition to its other types.

If a triggered ability of another creature you control of the chosen type triggers, it triggers an additional time.

{T}: Add {C}.

{4}, {T}: Target creature can't be blocked this turn.

Whenever an Elf you control dies, exile it.

{T}, Pay 2 life: Until end of turn, you may cast a creature spell from among cards exiled with Serpent's Soul-Jar.

Equipped creature gets +1/+1 and has trample and lifelink.

{1}: Permanents your opponents control lose hexproof and indestructible until end of turn.

Equip {2}

When Shaman of the Pack enters the battlefield, target opponent loses life equal to the number of Elves you control.

{T}: Add {B}.

{B}, {T}: Target legendary creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Search your library for up to two Forest cards, put them onto the battlefield, then shuffle.

{T}: Add {C}{C}.

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)

Equip {1}

{T}: Add {C}.

{T}: Add {B} or {G}. Talisman of Resilience deals 1 damage to you.

This spell costs {X} less to cast, where X is the greatest power among creatures you control.

{T}: Add {G}{G}. You gain 2 life.

Whenever a nontoken creature enters the battlefield under your control, put a +1/+1 counter on it and draw a card.

Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith.

At the beginning of combat on your turn, if The Ozolith has counters on it, you may move all counters from The Ozolith onto target creature.

Search your library for a Forest card, put it onto the battlefield, then shuffle.

{T}: Target creature gets +X/+X until end of turn, where X is the number of Elves on the battlefield.

Whenever a creature enters the battlefield under your control, draw a card if its power is 3 or greater. Otherwise, put two +1/+1 counters on it.

Whenever one or more Elves you control attack, they gain deathtouch until end of turn.

Each creature you control has "Whenever a mana ability of this creature resolves, put a number of +1/+1 counters on it equal to the amount of mana this creature produced. This ability triggers only once each turn."

Undergrowth Stadium enters the battlefield tapped unless you have two or more opponents.

{T}: Add {B} or {G}.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Urza's Saga gains "{T}: Add {C}."

II -- Urza's Saga gains "{2}, {T}: Create a 0/0 colorless Construct artifact creature token with 'This creature gets +1/+1 for each artifact you control.'"

III -- Search your library for an artifact card with mana cost {0} or {1}, put it onto the battlefield, then shuffle.

{T}, Pay 1 life, Sacrifice Verdant Catacombs: Search your library for a Swamp or Forest card, put it onto the battlefield, then shuffle.

{T}: Add {C}.

{3}, {T}, Pay life equal to the number of colors in your commanders' color identity: Draw a card.

{T}: Add {C}.

{G}, {T}: Untap target Elf.

Woodland Cemetery enters tapped unless you control a Swamp or a Forest.

{T}: Add {B} or {G}.

{T}: Add {C}.

{G}, {T}: Regenerate target creature.

Each land is a Forest in addition to its other land types.