Quidditch Pitch

{t} Add {1}. Put a point counter on Quidditch
Pitch.
Whenever a creature deals combat damage to
you, remove a point counter from Quidditch
Pitch.
Whenever a creature you control deals combat
damage to an opponent, put a point counter on
Quidditch Pitch. Then if it has ten or more
point counters on it, remove them all and that
player loses the game.