Nihil Spellbomb

Graveyard hate that doesn't cost you a card is the pitch, and the death trigger is what gives the card its staying power past the run of one-shot disruption artifacts that exile a yard and ask nothing else. Any deck can run it as a single-mana answer to flashback, delve, dredge, or reanimation, holding it until a graveyard is worth attacking, then tapping and sacrificing to wipe one player's clean. That colorless mode pays a real cost, because the replacement draw is gated behind a black source: sacrifice without untapped and you are simply down a card. The black version is the value play, paying on the death trigger to swap the spellbomb for a fresh draw so you are never stuck holding a dead artifact waiting for a target. That clause earns a narrow hate piece its longevity. Most situational answers commit a slot you might never need; this one converts into a cantrip the moment a black mana is available, which lets it sit in a deck with no specific reason to fear graveyards and still pull weight. The targeting matters too: it hits a single player's graveyard, not all of them, so against multiple recursion threats it answers one and forces a choice. As a tap-and-sacrifice artifact it telegraphs early and exiles totally rather than surgically, but the price of admission stays low enough that running it rarely feels like a tax.