Oni-Cult Anvil is a uncommon Artifact card from Kamigawa: Neon Dynasty (NEO), collector number 230. Current market price: $0.37 (foil $0.37), TCGplayer market prices via Scryfall.
Whenever one or more artifacts you control leave the battlefield during your turn, create a 1/1 colorless Construct artifact creature token. This ability triggers only once each turn. {T}, Sacrifice an artifact: This artifact deals 1 damage to each opponent. You gain 1 life.