Forsaken Monument is a mythic Legendary Artifact card from Zendikar Rising (ZNR), collector number 374. Current market price: $10.74 (foil $16.79), TCGplayer market prices via Scryfall.
Colorless creatures you control get +2/+2. Whenever you tap a permanent for {C}, add an additional {C}. Whenever you cast a colorless spell, you gain 2 life.