Tribune of the Gods

(The {x} in this spells casting cost is a multiplication
symbol) (This spell's converted mana cost is 100)
This spell costs {x} less to cast, where X is
quadruple the converted mana cost of all god
spells on the battlefield, in exile, and in your graveyard. (emblems count as 1 CMC)
Search your library and graveyard for any
number of god spells and exile them. As long
as they remain exiled, you may cast them without paying their mana cost and any time you could
cast an instant.