Withering Wisps

Enchantment, 1BB (3)
At end of turn, if no creatures are in play, sacrifice Withering Wisps.
{B}: Withering Wisps deals 1 damage to each creature and each player. Spend no more {B} this way each turn than the number of snow Swamps you control.¹
Illus. NéNé Thomas

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/6)	Ice Age (Uncommon)