+Wisps (6)
Target creature becomes black and gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)
Draw a card.
Target creature becomes blue until end of turn. Untap that creature.
Target creature becomes red and gains haste until end of turn. (It can attack and this turn.)
Target creature becomes white until end of turn. Tap that creature.
Target creature becomes green and gets +1/+0 until end of turn.
At the beginning of the end step, if no creatures are on the battlefield, sacrifice Withering Wisps.
: Withering Wisps deals 1 damage to each creature and each player. Activate no more times each turn than the number of snow Swamps you control.
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: Withering Wisps deals 1 damage to each creature and each player. Activate no more times each turn than the number of snow Swamps you control.