Thancred Waters is a rare Legendary Creature — Human Warrior card from Final Fantasy Commander (FIC), collector number 31. Current market price: $0.18, TCGplayer market prices via Scryfall.
Flash Royal Guard — When Thancred Waters enters, another target legendary permanent you control gains indestructible for as long as you control Thancred Waters. Whenever you cast a noncreature spell, Thancred Waters gains indestructible until end of turn.