Soul Chest

With an hour long ritual the chest can be soul
bound to a person's bloodline; after which only a member of that bloodline using a key forged from
the iron of their own blood can open the chest by inserting the key while and willing the chest into existence. The elaborate design on the back of the keyhole hides the pattern the key must formed
into to open the lock (DC 20 Investigation to
discern the pattern). If locked again, the chest
fades back into a pocket dimension, leaving the
simple meta