The Mycosynth Gardens is a rare Land — Sphere card from Phyrexia: All Will Be One (ONE), collector number 402. Current market price: $4.36 (foil $9.28), TCGplayer market prices via Scryfall.
{T}: Add {C}. {1}, {T}: Add one mana of any color. {X}, {T}: This land becomes a copy of target nontoken artifact you control with mana value X.