Cascade Seer is a common Creature — Merfolk Wizard card from Zendikar Rising (ZNR), collector number 48. Current market price: $0.11 (foil $0.11), TCGplayer market prices via Scryfall.
When this creature enters, scry X, where X is the number of creatures in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)