Have

Quirion Ranger

Return a Forest you control to its owner's hand: Untap target creature. Activate only once each turn.

Eladamri, Lord of Leaves

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.)

Kamahl, Fist of Krosa

{G}: Target land becomes a 1/1 creature until end of turn. It's still a land.
{2}{G}{G}{G}: Creatures you control get +3/+3 and gain trample until end of turn.

Priest of Titania

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

Mindless Automaton

Mindless Automaton enters with two +1/+1 counters on it.
{1}, Discard a card: Put a +1/+1 counter on Mindless Automaton.
Remove two +1/+1 counters from Mindless Automaton: Draw a card.

City of Solitude

Players can cast spells and activate abilities only during their own turns.

Heedless One

Trample
Heedless One's power and toughness are each equal to the number of Elves on the battlefield.

Seeker of Skybreak

Calming Verse

Destroy all enchantments you don't control. Then if you control an untapped land, destroy all enchantments you control.

Elvish Spirit Guide

Exile Elvish Spirit Guide from your hand: Add {G}.

Snow-Covered Forest

Winter Orb

As long as Winter Orb is untapped, players can't untap more than one land during their untap steps.

Argothian Elder

Coat of Arms

Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)

Crumble

Destroy target artifact. It can't be regenerated. That artifact's controller gains life equal to its mana value.

Vitalize

Worldly Tutor

Search your library for a creature card, reveal it, then shuffle and put the card on top.

Tormod's Crypt

{T}, Sacrifice Tormod's Crypt: Exile target player's graveyard.

Elvish Champion

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

Fyndhorn Elves

Instill Energy

Enchant creature
Enchanted creature can attack as though it had haste.
{0}: Untap enchanted creature. Activate only during your turn and only once each turn.

Collective Unconscious

Draw a card for each creature you control.

Slate of Ancestry

{4}, {T}, Discard your hand: Draw a card for each creature you control.

Gaea's Cradle

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

Concordant Crossroads

Nantuko Vigilante

Morph {1}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When Nantuko Vigilante is turned face up, destroy target artifact or enchantment.