Dragon's Chest
From MHWiki
Dragon's Chest is dropped by the Dragon Mouse in Dracano. It is placed in the "Special" inventory tab.
Description
A dragon mouse's prized possession is its treasure-- so why not keep it in a fancy, crystal-scaled box? Observers lucky enough to see the dragon mouse in its natural habitat can find it curled up around this chest at night, with its tail jealously wrapped around the lock. You cannot yet open this item.