Idol of False Gods is a uncommon Kindred Artifact — Eldrazi card from Modern Horizons 3 (MH3), collector number 210. Current market price: $0.31 (foil $0.38), TCGplayer market prices via Scryfall.
{1}{C}, {T}: Create a 0/1 colorless Eldrazi Spawn creature token with "Sacrifice this token: Add {C}." Whenever another Eldrazi you control dies, put a +1/+1 counter on this artifact. As long as this artifact has eight or more +1/+1 counters on it, it's a 0/0 creature in addition to its other types and it has annihilator 2.