Thundertrap Trainer

Valiant — Whenever this creature becomes the target of a spell or ability you control for the first time each turn, Mice you control get +1/+0 until end of turn. (This token's mana cost is W.)

When this creature enters, target creature you control gets +1/+1 until end of turn. (This token's mana cost is 2W.)

Defender

Whenever you attack, choose one — • Create a 1/1 white Rabbit creature token that's tapped and attacking. • Attacking creatures you control get +1/+1 until end of turn. (This token's mana cost is 2WW.)

Flying When this creature enters, target creature you control gains flying until end of turn. (This token's mana cost is 2U.)

When this creature enters, tap up to one target creature and put a stun counter on it. (This token's mana cost is 3U.)