My Champion Stands Supreme is a common Ongoing Scheme card from Duskmourn: House of Horror Commander (DSC), collector number 341. Current market price: $0.26, TCGplayer market prices via Scryfall.
(An ongoing scheme remains face up until it's abandoned.) Your commander has ward {2}. Whenever your commander attacks, put two +1/+1 counters on it. When your commander leaves the battlefield, abandon this scheme.