Me, holding my giant King's Court, Witch, and Cultist mega-combo hand that will give my opponent 10 Curses and 10 Ruins on my turn, waiting for him to finish his turn.
My opponent, buying new Donate on his turn.
Me, releasing that new Donate wording isn't really relevant here, with old Donate my opponent would have simply bought Donate the turn after I played my combo instead of the turn before.