Nihil Spellbomb is a common Artifact card from Scars of Mirrodin (SOM), collector number 187. Current market price: $3.06 (foil $20.74), TCGplayer market prices via Scryfall.
{T}, Sacrifice this artifact: Exile target player's graveyard. When this artifact is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.