Trigon of Thought is a uncommon Artifact card from Scars of Mirrodin (SOM), collector number 217. Current market price: $0.11 (foil $0.28), TCGplayer market prices via Scryfall.
This artifact enters with three charge counters on it. {U}{U}, {T}: Put a charge counter on this artifact. {2}, {T}, Remove a charge counter from this artifact: Draw a card.