Okglugal, Mana Ravanger

Indestructible
Whenever a player casts a spell, Okglugal, Mana Ravanger deals damage to that player equal to
their devotion to the colors of the cast spell's
color identity.
When Okglugal, Mana Ravanger is put into a graveyard from anywhere, its owner shuffles their graveyard into their library.