Discover the Impossible
The escape hatch is what separates this from the run of impulse-draw effects. Most of them hand you the exiled card and stop; this one bolts on a conditional free cast, but only for the narrowest possible payload: an instant of mana value two or less. That ceiling is doing double duty. It keeps the free-spell mode honest (no chaining into an expensive counter or a heavy bounce), and it quietly favors a deck already stocked with cheap reactive spells over one that treats the free cast as a lucky bonus. Dig five, exile one, and when the exiled card is a Spell Pierce or an Opt-tier instant, you cast it for nothing at instant speed; when it is anything else, it lands in hand. The four cards you passed over go to the bottom in a random order, which is the price of the selection: no thinning, and good cards buried where you cannot reach them. The timing is where the card earns its keep. Cast on the opponent's turn, it can convert found interaction into an immediate response, spending their tempo window instead of your own. That rewards a spell-dense build where the exiled card is often something you want to fire back right away, collapsing two decisions (which card, cast it now) into a single instant-speed beat.
