Mind's Dilation (SLD) #1180 [EN/F]

{5}{U}{U} · Enchantment · Whenever an opponent casts their first spell each turn, that player exiles the top card of their library. If it's a nonland card, you may cast it without paying its mana cost. · Depart yourself; one mind is too small a vessel. · Illustrated by Ori Toor · Secret Lair Drop #1180 · EDHREC rank 2682 · Magic: The Gathering, MTG