Bardic Magic: Transmutation

{1}{w}{w}{t} Roll a d20.
•1 - 9: Enhance Ability - Target creature gains +2/+2
until your next turn.
•10 - 18: Polymorph - Destroy target creature. That
creature's controller puts a 0/1 Sheep token into play.
•19 - 20: Slow - Tap all creatures target player controls.
Those creatures don't untap during that player's next
untap step.