Festering Wound

Enchantment - Aura, 1B (2)
Enchant creature

At the beginning of your upkeep, you may put an infection counter on Festering Wound.

At the beginning of the upkeep of enchanted creature's controller, Festering Wound deals X damage to that player, where X is the number of infection counters on Festering Wound.¹
Illus. Chippy and Matthew Wilson

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: If it is on your creature, you can decide whether to add a counter before or after it damages you.
• 10/4/2004: Putting on a counter is optional. If you forget, you can't go back later even if it is something you usually do.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard, MTGO Classic
Printings (1/6)	Urza's Destiny (Uncommon)