Withering Wisps (Ice Age)

At the beginning of the end step, if no creatures are on the battlefield, sacrifice this enchantment. {B}: This enchantment deals 1 damage to each creature and each player. Activate no more times each turn than the number of snow Swamps you control.

NM - $0.70
LP - $0.70
MP - $0.70
HP - $0.70
DMG - $0.70