Discordant Spirit

{2}{B}{R} · Creature — Spirit

At the beginning of each end step, if it's an opponent's turn, put a +1/+1 counter on this creature for each 1 damage dealt to you this turn. At the beginning of your end step, remove all +1/+1 counters from this creature.

Motor: se resuelve a mano

Rulings (2)

In Two-Headed Giant, triggers only once per end of turn, not once for each player.
Wizards of the Coast · 2006-05-01
This will not count damage that was prevented.
Wizards of the Coast · 2004-10-04