Microscope is a rare Artifact card from Mystery Booster 2 (MB2), collector number 607. Current market price: $0.30, TCGplayer market prices via Scryfall.
{T}: Surveil 1. {T}: Target permanent card in a graveyard becomes a 0/0 black Germ creature in addition to its other colors and types until end of turn. (This effect ends if it leaves the graveyard.)