Power Leak - Revised Edition - 73

Enchantment — Aura

Mana Cost: {1}{U}

Enchant enchantment
At the beginning of the upkeep of enchanted enchantment's controller, that player may pay any amount of mana. This Aura deals 2 damage to that player. Prevent X of that damage, where X is the amount of mana that player paid this way.

Common · Revised Edition · #73 (3ED)

Illustrated by Drew Tucker