Mizzix, Replica Rider

The earlier Mizzix reduced the cost of your instants and sorceries; this one changes what casting them off the top or out of exile is worth. The trigger cares specifically about spells cast from anywhere other than your hand, which is the design tell: this is a payoff for the impulse-draw and flashback engines red has spent years accumulating, not a generic storm enabler. Every Light Up the Stage exile, every cascade hit, every spell rebound from exile becomes a copy for two mana (one generic, one hybrid), and the new-targets clause means those copies are not dead weight when the original was a one-target removal spell. The permanent-copy rider is where the card shows real restraint. Copies of permanent spells arrive with haste and a scheduled sacrifice at your end step, so the effect is a burst, not a board that compounds turn over turn: you get an attacker or a one-shot enters-the-battlefield trigger, then the token is gone. That end-step clause caps the upside so the ability can be cheap and always-on without folding games in a single turn, doing the work a finality counter does elsewhere. Behind the pip is a Mizzix that rewards a red deck built to cast from the graveyard and exile rather than the hand, a genuinely different construction than the original commander's cost-cutter shell asked for.