Bloomburrow

Flowerfoot Swordmaster | Creature | Mouse Soldier | Offspring {2} (You may pay an additional {2} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) 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. | Aaron Miller

Seasoned Warrenguard | Creature | Rabbit Warrior | Whenever Seasoned Warrenguard attacks while you control a token, Seasoned Warrenguard gets +2/+0 until end of turn. | Dave Kendall

Bonecache Overseer | Creature | Squirrel Warlock | {T}, Pay 1 life: Draw a card. Activate only if three or more cards left your graveyard this turn or if you've sacrificed a Food this turn. | Mila Pesic

Heartfire Hero | Creature | Mouse Soldier | Valiant — Whenever Heartfire Hero becomes the target of a spell or ability you control for the first time each turn, put a +1/+1 counter on it. When Heartfire Hero dies, it deals damage equal to its power to each opponent. | Jakub Kasper