Shrapnel Blast

Five damage to any target at instant speed should not be available this cheap, and the sacrifice clause is exactly why it is: the artifact you feed it has to already be on the battlefield, already have done its job or be willing to die for the burn. That cost turns a busted number into the closer an artifact-aggro curve was always building toward. A board full of zero-cost artifacts is a board full of ammunition, and the spell converts a spent Frogmite or a tapped-out Ornithopter directly into a face full of damage at the only window that matters. Cast it in a vacuum and it punishes you (you give up a permanent and a card to do it), so the line only works once the rest of your deck has made artifacts cheap and disposable. That dependency is the design, not a footnote to it: this is not a removal spell or a reach spell in the abstract, it is the payoff at the end of an artifact aggro deck's curve, the line that takes a clogged board and a stalled turn and ends them. The "sacrifice a permanent for a big burst" template has shown up across many eras, but few versions ask so little upfront and pay back so much, precisely because the cost is paid in cards you wanted to spend anyway.