Trigon of Corruption is a uncommon Artifact card from Scars of Mirrodin (SOM), collector number 213. Current market price: $0.18 (foil $0.56), TCGplayer market prices via Scryfall.
This artifact enters with three charge counters on it. {B}{B}, {T}: Put a charge counter on this artifact. {2}, {T}, Remove a charge counter from this artifact: Put a -1/-1 counter on target creature.