Spinerock Tyrant

Copy effects on spells have always lived in blue, and the ones that stray into red tend to attach to storm counts or straight burn. This Dragon does something structurally different: it fuses spell-doubling onto a body, then launders the copies through wither. The single-target restriction sets the price of the effect. It cannot fork a sweeper or a mass-pump, only spells that point at one thing, which caps the ceiling while still doubling your burn, your bounce, your best targeted removal. The wither rider is the real design wrinkle. When a copied spell resolves against a creature, its damage arrives as -1/-1 counters, so a duplicated burn spell does not just deal twice; it permanently shrinks whatever it hits and leaves any survivor smaller for good. Point a copy at a token or a modest blocker and it may not live to be targeted again. The 6/6 flying body is almost incidental once the engine is online, though it does mean the card threatens lethal on its own while the copies grind the board down. What makes it worth building around is the compounding: every efficient single-target instant or sorcery you already wanted to run gets a second copy with permanent-counter upside stapled to it, and the more you cast, the more the counters accumulate on the far side of the table.