Power Leak - Fourth Edition (Common)

Power Leak is a blue Aura from Fourth Edition that enchants another enchantment. At the start of the enchanted enchantment's controller's upkeep, they can pay any amount of mana, and Power Leak will deal 2 damage for each point of mana they don't pay, while allowing them to prevent some of that damage based on how much they choose to pay. This card can be a strategic choice in decks that focus on controlling the board or punishing opponents for their investment in enchantments, but it requires careful timing and knowledge of your opponent’s resources. Available from Vault of Cards, a UK-based Magic: The Gathering store with fast delivery.