Surtr, Primal Fire Jötunn

Trample

When Surtr, Primal Fire Jötunn enters, each player exiles cards from the top of their library until they exile a nonland card. You may cast any number of spells from among the nonland cards exiled this
way without paying their mana costs.

{9}{p/g}: Transform Surtr. Activate only as a sorcery.