Paladin Danse, Steel Maverick is a uncommon Legendary Artifact Creature — Synth Knight card from Fallout (PIP), collector number 20. Current market price: $0.33 (foil $5.48), TCGplayer market prices via Scryfall.
Vigilance, lifelink Exile Paladin Danse: Each creature you control that's an artifact or Human gains indestructible until end of turn.