Wren's Run Vanquisher is a uncommon Creature — Elf Warrior card from The List (PLST), collector number DD1-19. Current market price: $0.34, 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.)