It pairs nicely with rummage effects since discarding this Izzet card is like losing half a card rather than a whole one
It doesn't copy whether that Villain is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on
Had it had cost reduction it would have broken as shell
A handful of cards let you play exiled cards beyond the current or next turn
(This includes disguise, cloak, and in games involving older cards, morph and manifest, as well as a few other effects that turn cards face down.) Common methods for doing this include using markers or dice, or simply placing them in order on the battlefield