Mabius, Aetherflux Meddler

{b/r}{b/r}, Exile a card from your hand or a
permanent you control: Counter target spell controlled by an opponent. That player reveals
the top 5 cards of their library. They may cast 1 without paying its mana cost. Put the rest on the bottom of their library in any order.
Mabius had learned to access the Maelstorm
directly; but at what cost.