Twisted Riddlekeeper

Emerge always sold the same trick: pay eight if you must, but if you have a creature to feed the mechanism, the real cost is whatever slips through after that creature's mana value is subtracted. The generic eight is a decoy price; the intended line is casting off the back of a chump or a spent utility body and landing this well ahead of curve, blue mana permitting. What separates this one from the usual emerge fatty is the payoff attached to the cast, not the resolution. The stun-counter tap happens on the cast trigger, which means it fires whether or not the body ever hits the battlefield: counter the 5/5 flier and you have still frozen two permanents. Stun counters are a stickier form of tapping than the old tap-down effects; a stunned permanent stays down through its controller's next untap step, so this functions as a two-target Frost Titan-style lock the turn it enters, ripping open a window to swing or resolve something unanswered. The flying body then closes on the clock the tempo swing bought. It is a piece of design that stacks two separate tempo profits (the emerge discount and the double-freeze) onto a single spell, and rewards a deck built to have a fodder creature ready and a target worth locking down when the swap happens.