Skophos Maze-Warden 

Creature — Minotaur Warrior
{1}: This creature gets +1/-1 until end of turn.
Whenever another creature becomes the target of an ability of a land you control named Labyrinth of Skophos, you may have this creature fight that creature. (Each deals damage equal to its power to the other.)
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Cards that do something similar expected a card that isn't here?
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Flailing Ogre 83%
$0.22#29787
"{1}: This creature gets -1/-1 until end of turn. Any player may activate this ability."
Flailing Soldier 83%
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"{1}: This creature gets -1/-1 until end of turn. Any player may activate this ability."