Beamsplitter Mage is a uncommon Creature — Vedalken Wizard card from Guilds of Ravnica (GRN), collector number 155. Current market price: $0.27 (foil $0.44), TCGplayer market prices via Scryfall.
Whenever you cast an instant or sorcery spell that targets only this creature, if you control one or more other creatures that spell could target, choose one of those creatures. Copy that spell. The copy targets the chosen creature.