Linvala, Shield of Sea Gate is a rare Legendary Creature — Angel Wizard card from The List (PLST), collector number ZNR-226. Current market price: $0.31, TCGplayer market prices via Scryfall.
Flying At the beginning of combat on your turn, if you have a full party, choose target nonland permanent an opponent controls. Until your next turn, it can't attack or block, and its activated abilities can't be activated. Sacrifice Linvala: Choose hexproof or indestructible. Creatures you control gain that ability until end of turn.