Festering Wound

{1}{B} · Enchantment — Aura

Enchant creature At the beginning of your upkeep, you may put an infection counter on this Aura. At the beginning of the upkeep of enchanted creature's controller, this Aura deals X damage to that player, where X is the number of infection counters on this Aura.

Motor: se resuelve a mano

Rulings (2)

If it is on your creature, you can decide whether to add a counter before or after it damages you.
Wizards of the Coast · 2004-10-04
Putting on a counter is optional. If you forget, you can't go back later even if it is something you usually do.
Wizards of the Coast · 2004-10-04