Skreggat, of the Vile Host

Protection from copying effects you control.

When Skreggat, of the Vile Host enters or attacks, you may Sacrifice 2 rats: Mill 2 cards.

Whenever Skreggat, of the Vile Host attacks, it
gains +X/+0 for each rat in your graveyard with a different name. Then you may return target rat
from your graveyard with converted mana cost of
X/2 rounded down or less to the battlefield tapped
and attacking with a finality counter.