Epic Obsession

At the beginning of your end step, if you cast no spells this turn other than spells named Epic Obsession, put an obsession counter
on Epic Obsession.
Remove X obsession counters from Epic Obsession: Search your library for a card with converted mana cost X, exile that card, then shuffle your library. You may cast that card without paying its mana cost. X can't be less
than 6.