Heartfire Hero
Bloomburrow — Uncommon
Creature — Mouse Soldier
Sets Heartfire Hero has been printed in:

Bloomburrow — Uncommon
Creature — Mouse Soldier
Sets Heartfire Hero has been printed in:

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Creature — Mouse Soldier (3/2)
Vigilance, haste
Valiant — Whenever Seedglaive Mentor becomes the target of a spell or ability you control for the first time each turn, put a +1/+1 counter on it.
Artifact Creature — Toy (1/1)
Indestructible
Whenever Giggling Skitterspike attacks, blocks, or becomes the target of a spell, it deals damage equal to its power to each opponent.
: Monstrosity 5. (If this creature isn't monstrous, put five +1/+1 counters on it and it becomes monstrous.)
Creature — Mouse Soldier (3/2)
Flash
Valiant — Whenever Mouse Trapper becomes the target of a spell or ability you control for the first time each turn, tap target creature an opponent controls.
Creature — Mouse Warrior (2/2)
Haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Valiant — Whenever Emberheart Challenger becomes the target of a spell or ability you control for the first time each turn, exile the top card of your library. Until end of turn, you may play that card.
Creature — Mouse Soldier (1/2)
Offspring (You may pay an additional 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.
Creature — Mouse Soldier (3/1)
Valiant — Whenever Nettle Guard becomes the target of a spell or ability you control for the first time each turn, it gets +0/+2 until end of turn.
, Sacrifice Nettle Guard: Destroy target artifact or enchantment.
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