Burning-Tree Emissary

When Burning-Tree Emissary enters, add {R}{G}.

Wild Nacatl

Wild Nacatl gets +1/+1 as long as you control a Mountain.
Wild Nacatl gets +1/+1 as long as you control a Plains.

Keldon Marauders

Vanishing 2 (This creature enters with two time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
When Keldon Marauders enters or leaves the battlefield, it deals 1 damage to target player or planeswalker.

Crimson Fleet Commodore

Trample
When Crimson Fleet Commodore enters, you become the monarch.

Highland Forest

({T}: Add {R} or {G}.)
Highland Forest enters tapped.

Goblin Bushwhacker

Kicker {R} (You may pay an additional {R} as you cast this spell.)
When this creature enters, if it was kicked, creatures you control get +1/+0 and gain haste until end of turn.

Kird Ape

Kird Ape gets +1/+2 as long as you control a Forest.

Kor Skyfisher

Flying
When Kor Skyfisher enters, return a permanent you control to its owner's hand.

Alpine Meadow

({T}: Add {R} or {W}.)
Alpine Meadow enters tapped.

Skred

Skred deals damage to target creature equal to the number of snow permanents you control.

Young Wolf

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Sarulf's Packmate

When Sarulf's Packmate enters, draw a card.
Foretell {1}{G} (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.)

Horned Kavu

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