Nibelheim Aflame

Two spells share one shell, and the graveyard clause is where the second one lives. Cast from hand, it is a fight-adjacent sweeper that turns one of your creatures into a board-clearing cannon: point a big enough power at the rest of the battlefield and the damage lands on everything else, opponents' creatures and any of your own besides the shooter. That single-target caveat is the tell about who wants this. It rewards a tall deck built around one oversized threat, not a wide one; a go-wide board would be mowing down its own creatures alongside the enemy's. The catch is that the mode you actually want is the one the first cast cannot reach. Flashback from the graveyard bolts the wheel onto the sweep: discard your hand and draw four, appended to the same board wipe. So the play pattern is to spend it early as removal, then buy it back later as refill-plus-sweep at a premium cost, exiling itself on the way out. That sequencing is the whole strategic axis: the graveyard-only draw clause converts a one-note removal spell into a two-stage resource engine, and flashback's exile is what stops it from looping into an infinite wheel. The reliance on your own creature's power is the restriction that pays for all of it; with no large enough body on the board, it is a dead card, so it belongs to the deck that can reliably field one threat worth pointing.