Svyelun of Sea and Sky is a mythic Legendary Creature — Merfolk God card from The Lost Caverns of Ixalan Commander (LCC), collector number 175. Current market price: $0.47, TCGplayer market prices via Scryfall.
Svyelun has indestructible as long as you control at least two other Merfolk. Whenever Svyelun attacks, draw a card. Other Merfolk you control have ward {1}. (Whenever another Merfolk you control becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.)