Archon of Coronation is a mythic Creature — Archon card from Commander Legends (CMR), collector number 9. Current market price: $0.49 (foil $0.86), TCGplayer market prices via Scryfall.
Flying When this creature enters, you become the monarch. As long as you're the monarch, damage doesn't cause you to lose life. (When a creature deals combat damage to you, its controller still becomes the monarch.)