Za'Koth, Ancient Tyrant

When Za'Koth, Ancient Tyrant enters the battlefield, target opponent sacrifices three permanents. Create three 0/0 Fossil creature
tokens. Whenever another creature dies, create a
0/0 Fossil creature token. When Za'Koth, Ancient Tyrant dies, sacrifice all Fossil creature tokens you control. Search your library for any number of permanents with total converted mana cost less
than or equal to the number of Fossil creature
tokens sacrificed. Put them onto the battlefield.