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.
{10}: Sacrifice Artorias, Knight of Sacrifices: Search
your library for 3 black creatures with a cost of 5
or greater and place them onto the battlefield
tapped.