Daggermaw Megalodon is a common Creature — Shark card from Duskmourn: House of Horror (DSK), collector number 48. Current market price: $0.20 (foil $0.25), TCGplayer market prices via Scryfall.
Vigilance Islandcycling {2} ({2}, Discard this card: Search your library for an Island card, reveal it, put it into your hand, then shuffle.)