Anzrag's Rampage

The wrinkle sits in the sequencing: the destruction and the exile-dig happen inside one resolution, but the count of "artifacts that were put into graveyards from the battlefield this turn" tallies everything, not just what this spell blew up. That is the design tell. On its own the sweep clears opposing artifacts and pays you back with a top-of-library dig sized by the wreckage, and a hasty creature can crash in for one attack before it bounces back to hand at the next end step. Built around, though, the card wants you to have already dismantled artifacts before it resolves: sacrifice outlets, prior removal, a Treasure or Blood-token engine you cracked earlier all feed the X, turning a modest cleanup spell into a deep dig with a free creature attached. The temporary cheat-into-play is the honest part of the exchange: the creature comes off the top of your library rather than a graveyard, and it does not stay, so the payoff is a single haste-enabled swing plus the card back in hand, not a permanent body. Red rarely gets to convert board attrition into card selection this directly; here the artifacts you have already spent become the fuel that turns the top of your deck over, and the more artifact death you can manufacture before casting it, the further the spell reaches.