Iosefka's Clinic

{2}: Target a creature you control and roll a d20. Activate this only once each turn as a sorcery.
1: It becomes a 1/1 blue Celestial Mob token,
give target opponent control over it.
2 - 9: Put a +1/+1 on that creature.
10 - 19: Put a +3/+3 on that creature.
20: Put a +3/+3 on that creature and it gains one
of the following keywords: Vigilance, Lifelink, Deathtouch, Trample.