Upbeat Undead

Upbeat Undead enters the battlefield with 3 +1/+1 counters on it.
If damage would be dealt to Upbeat Undead while it has a +1/+1 counter on it, remove
one of those counters instead.
Whenever a card you own is put into exile
from your hand or graveyard, put a +1/+1 counter on Upbeat Undead.