Bag of Secrecy

This small bag appears normal but is warded against theft. The bag functions as if it were effected by the arcane lock spell. The owner or any creature who knows the verbal component can open the bag upon speaking the unlock password. Casting knock renders the bag unmagical for 10 minutes. 

Attempts to break or force the bag open require a DC 20 strength or slight of hand check.

If the bag is separated from the owner, after 1d4 hours the bag will do 1d6 force damage to the thief and will teleport back to the owner.