Wren's Run Packmaster is a rare Creature — Elf Warrior card from Magic Online Promos (PRM), collector number 31965.
Champion an Elf (When this creature enters, sacrifice it unless you exile another Elf you control. When this creature leaves the battlefield, that card returns to the battlefield.) {2}{G}: Create a 2/2 green Wolf creature token. Wolves you control have deathtouch.