Ezu, Mastermind of Duplicity

When Ezu, Mastermind of Duplicity enters the
battlefield create a token copy of another creature
on the battlefield except it gains "When Ezu,
Mastermind of Duplicity leaves the battlefield,
sacrifice this creature." and "When a creature
enters the battlefield you may have this creature
become a copy of that creature."
{u/b}{u/b}{u/b}: Return Ezu, Mastermind of Duplicity
from the battlefield to its owner's hand.