10 outsiders slain by this monster

Summary
Attention all outsiders! A powerful beast has been attacking outposts at night and kidnapping people in their sleep. It also stole an important shipment of supplies that was on its way to the guild. This beast is believed to live in a small cave nearby. Whoever can slay this beast and retrieve the shipment will be rewarded greatly.

Requirement: Supply Crate

Reward: Guild Special Armor

Guide
If you talk to the beast in the cave instead of fighting it you can get the supply crate without having to kill it, but you lose out on the experience from fighting the monster.