Kharis & the Beholder

Flying
When Kharis & the Beholder enters the battlefield and at the beginning of your upkeep, create a 1/1
white Human creature token and make a charisma check. (Roll a d20.)
•If the result plus the number of creatures you control is greater than 11,
put a +1/+1 counter on each creature.
•If the result is a natural 20, for each nonlegendary creature you control,
create a token copy of that creature.