Wren's Run Vanquisher is a uncommon Creature — Elf Warrior card from Lorwyn (LRW), collector number 245. Current market price: $0.32 (foil $1.34), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, reveal an Elf card from your hand or pay {3}. Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)