Serra the Benevolent is a mythic Legendary Planeswalker — Serra card from Secret Lair Drop (SLD), collector number 1252. Current market price: $7.82 (foil $7.55), TCGplayer market prices via Scryfall.
+2: Creatures you control with flying get +1/+1 until end of turn. −3: Create a 4/4 white Angel creature token with flying and vigilance. −6: You get an emblem with "If you control a creature, damage that would reduce your life total to less than 1 reduces it to 1 instead."