From the preview:
The Jade Emperor found this creature high in the snow shrouded Himalayas. Through arcane rituals or more mundane torture these creatures have been bound into service of the Emperor for countless centuries.
The Yeti is a fearsome combatant and serves as the Jade Cult Powerhouse. He attacks swiftly and with unmatched ferocity then fades into night. His terrifying howl is often the last sound heard by an enemy of the Jade Cult.