Elvish Archdruid

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

Elvish Warmaster

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.

Forest

Mountain

Arachnoid Adaptation

Target creature gets +2/+2 and gains reach until end of turn. Untap it.

Llanowar Elves

Burst of Strength

Put a +1/+1 counter on target creature and untap it.

Marwyn, the Nurturer

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

Ezuri, Renegade Leader

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

Elvish Mystic

Banefire

Banefire deals X damage to any target.
If X is 5 or more, this spell can't be countered and the damage can't be prevented.

Llanowar Tribe

Stony Strength

Put a +1/+1 counter on target creature you control. Untap that creature.

Gaea's Cradle

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