Teapot, hungry dungeon

Teapot, hungry dungeon enters the battlefield
with X +1/+1 counters on it. At the beginning of
your end step, sacrifice another creature. If you
don't, remove a +1/+1 counter from Teapot.
When a creature dealt damage by Teapot or a creature you control dies, you may exile it.
{w}{u}{b}{r}{g},{t}: For each creature exiled with
Teapot, create a token copy of that creature.They
have haste and "sacrifice this creature at the
beginning of the next end step".