Cavern Harpy

Flying
When Cavern Harpy enters, return a blue or black creature you control to its owner's hand.
Pay 1 life: Return Cavern Harpy to its owner's hand.

Lava Zombie

When Lava Zombie enters, return a black or red creature you control to its owner's hand.
{2}: Lava Zombie gets +1/+0 until end of turn.

Steel Leaf Paladin

First strike
When Steel Leaf Paladin enters, return a green or white creature you control to its owner's hand.

Silver Drake

Flying
When Silver Drake enters, return a white or blue creature you control to its owner's hand.

Horned Kavu

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