Marang River Regent // Coil and Catch is a rare Creature — Dragon // Instant — Omen card from Tarkir: Dragonstorm Promos (PTDM), collector number 51p. Current market price: $1.43 (foil $2.59), TCGplayer market prices via Scryfall.
All Tarkir: Dragonstorm Promos cards and prices