Each other creature you control enters with a number of additional +1/+1 counters on it equal to Arwen's toughness.

Elves you control have "Whenever this creature becomes tapped during your turn, untap it and put a +1/+1 counter on it. This ability triggers only once each turn."

Whenever you cast a creature spell, draw a card.

Vigilance Whenever you cast a creature spell, draw a card, then you may put a land card from your hand onto the battlefield. {3}, {T}: Return target creature you control to its owner's hand.

You may look at the top card of your library any time. You may cast creature spells from the top of your library. {G}, {T}, Tap two untapped creatures you control: Reveal a card from your hand or the top card of your library. If you reveal a creature card this way, put it onto the battlefield. Activate only during your turn.

Other Elves you control get +1/+1. Whenever you cast an Elf spell, you may pay {G}. If you do, draw a card.

Haste When this creature enters, creatures you control gain trample and get +X/+X until end of turn, where X is the number of creatures you control.

({T}: Add {G}.)

({T}: Add {U}.)

({T}: Add {W}.)

Other Elf creatures have forestwalk. (They can't be blocked as long as defending player controls a Forest.) Other Elves have shroud. (They can't be the targets of spells or abilities.)

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

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.

{T}: For each color among permanents you control, add one mana of that color.

Other Elf creatures you control get +1/+1. {T}: Add {G} for each Elf you control.

{T}: Add {G}.

{T}: Add {G}.

{T}: Add {G}.

Whenever another Elf you control enters, put a +1/+1 counter on Marwyn. {T}: Add an amount of {G} equal to Marwyn's power.

{T}: Add {G} for each Elf on the battlefield.

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep. You draw a card at the beginning of the next turn's upkeep.

Whenever one or more other Elves you control enter, 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.

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

When this creature enters, you may search your library for an Elf card, reveal it, then shuffle and put that card on top. {T}: Add one mana of any color.