Emrakul's Angel

Emrakul's Angel can't be countered.
Flying, Menance, Deathtouch
When Emrakul's Angel enters the battlefield, exile a creature you control with it or sacrifice Emrakul's Angel.
Emrakul's Angel gets +2/+2 for each card exiled with it.
Whenever Emrakul's Angel would be destroyed, you may return a creature exiled with it into its owner's graveyard instead.