Mishra's Factory is a rare Land card from Modern Horizons 2 (MH2), collector number 326. Current market price: $0.77 (foil $1.07), TCGplayer market prices via Scryfall.
{T}: Add {C}. {1}: This land becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land. {T}: Target Assembly-Worker creature gets +1/+1 until end of turn.