Big Jack Horner

At the beginning of each upkeep, roll a d20:

1-3—Baby Unicorn Horn: Sacrifice a creature.
4-12—Magical Snacks: Put 3 +1/+1 counters on
target creature you control.
13-19—Excalibur: Target creature you control
deals damage equal to its power to target
creature you don't control.
20{line}Baker's Dozen: Create 13 black 1/1 Chef
creature tokens.