Farhaven Elf

When this creature enters, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Storm Caller

When this creature enters, it deals 2 damage to each opponent.

Forest

Tin Street Hooligan

When this creature enters, if {G} was spent to cast it, destroy target artifact.

Jewel Thief

Vigilance, trample
When this creature enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Molten Gatekeeper

Whenever another creature you control enters, this creature deals 1 damage to each opponent.
Unearth {R} ({R}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Goblin Anarchomancer

Each spell you cast that's red or green costs {1} less to cast.

Horned Kavu

When this creature enters, return a red or green creature you control to its owner's hand.

Burning-Tree Emissary

Mountain

Arboreal Grazer

Reach
When this creature enters, you may put a land card from your hand onto the battlefield tapped.