Artorias, Knight of Sacrifices

Deathtouch, Menace, Hexproof, Indestructible
When Artorias, Knight of Sacrifices enters the battlefield you may sacrifice X amount of owner's creatures, for each creature sacrificed this way Artorias, Knight of Sacrifices gets +1/1.
{t}: Sacrifice Artorias, Knight of Sacrifices:
Search your library for 5 black creatures with a
cost of 3 or greater and place them onto the battlefield tapped.