The Joker

{t}{x}{r} roll a D20:
1-3: The Joker deals X damage to target creature
or player where X is the number rolled.
4-10: tap target creature, that creature does
not untap in its controllers next untap phase
11-17: create 2 treasure tokens
18-20: all creatures have - toxic 1
Madness {p/b}{p/r}