Practiced Tactics is a common Instant card from Zendikar Rising (ZNR), collector number 32. Current market price: $0.18 (foil $0.31), TCGplayer market prices via Scryfall.
Choose target attacking or blocking creature. Practiced Tactics deals damage to that creature equal to twice the number of creatures in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)