Soul of Shandalar is a mythic Creature — Avatar card from The List (PLST), collector number M15-163. Current market price: $0.25, TCGplayer market prices via Scryfall.
First strike {3}{R}{R}: This creature deals 3 damage to target player or planeswalker and 3 damage to up to one target creature that player or that planeswalker's controller controls. {3}{R}{R}, Exile this card from your graveyard: It deals 3 damage to target player or planeswalker and 3 damage to up to one target creature that player or that planeswalker's controller controls.