Kevin Durant, Slim Reaper

Trample, first strike

When Kevin Durant, Slim Reaper enters the battlefield, 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.
{6}{w}{b}: Transform Kevin Durant. Activate this
only as a sorcery.