Plagon, Lord of the Beach is a rare Legendary Creature — Starfish Wizard card from Foundations Jumpstart (J25), collector number 37. Current market price: $0.98, TCGplayer market prices via Scryfall.
When Plagon enters, draw a card for each creature you control with toughness greater than its power. {W/U}: Target creature you control assigns combat damage equal to its toughness rather than its power this turn.