Kiora of Salt and Sand is a uncommon Legendary Creature — Merfolk Noble card from Reality Fracture (FRA), collector number 273. Current market price: $0.21 (foil $0.27), TCGplayer market prices via Scryfall.
Whenever you attack, if you've activated a loyalty ability this turn, untap target attacking creature. It can't be blocked this turn. Planeswalkers you control have "[−8]: Create an 8/8 blue Leviathan creature token with hexproof."