Indomitable Archangel is a mythic Creature — Angel card from Scars of Mirrodin (SOM), collector number 11. Current market price: $0.59 (foil $7.13), TCGplayer market prices via Scryfall.
Flying Metalcraft — Artifacts you control have shroud as long as you control three or more artifacts. (An artifact with shroud can't be the target of spells or abilities.)