Ashlock, All-Seeing Eye

Flash
Vigilance, Reach

When Ashlock enters the battlefield, reveal cards from the top of your library until you reveal a nonland card. Exile it. Then put all of the revealed cards on the bottom of your library in a random order. You may cast the exiled card without paying its mana cost for as long as it remains exiled.
{u}{b}{r}{g}: Exile any number of target nonland permanents until the next endstep. Then return those nonland permanents to the battlefield under their
owner's control.