Surge to Victory

Two payoffs stapled together in a way most graveyard-recursion spells keep separate. The first half is a raw pump scaled to whatever you dig out of your yard: exile a six- or seven-mana sorcery and every attacker swings for a serious premium, unusual precisely because the boost reads off a card's mana value rather than a fixed number. Note the trap this creates: X-spells count X as zero in the graveyard, so an exiled Fireball feeds almost nothing to the +X/+0, and the free copy would resolve with X at zero anyway. The card wants fixed high-cost spells, not scalable ones. The second half is where it turns into an engine: it doesn't recur the exiled spell on cast, it waits for combat damage and then copies it for each creature that connects. That timing is the whole design. The pump makes your creatures more likely to break through; breaking through is what triggers the free copies; and because the copy fires on damage rather than resolution, a wide board can generate several free casts of a single expensive spell in one turn. Nothing about it works in a vacuum: a graveyard with only cheap burn to exile gives you a tiny buff and a marginal copy, while one salted with fat fixed-cost instants and sorceries turns a mediocre attack into a chain of free game-enders. It punishes the player who casts it off the top with nothing worth exiling underneath.