Burning-Tree Shaman 
Creature — Centaur Shaman
Whenever a player activates an ability that isn't a mana ability, this creature deals 1 damage to that player.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Creature — Centaur Shaman
Whenever a player activates an ability that isn't a mana ability, this creature deals 1 damage to that player.