At the beginning of the end step, if no creatures are on the battlefield, sacrifice Withering Wisps.
{B}: Withering Wisps deals 1 damage to each creature and each player. Activate this ability no more times each turn than the number of snow Swamps you control.
Near Mint - $0.40
Near Mint Non-English - $0.40
Lightly Played - $0.40
Lightly Played Non-English - $0.40
Played - $0.30
Played Non-English - $0.30
Heavily Played - $0.30
Heavily Played Non-English - $0.30
Damaged - $0.20
Damaged Non-English - $0.20