Utter Obliteration

Split second
Permanents lose hexproof, shroud, and indestructible until end of turn.
Utter Obliteration deals 15 damage to each creature and 10 damage to each player. If a creature dealt damage this way would die this turn, exile it instead.
Exile all permanents.
Search your library for up to 3 basic Mountain cards and put them onto the battlefield tapped. Then shuffle your library.