Quest Chests are items awarded from Tinkerer Quests. Using them spawns a destructible chest that can be broken for items (as well as a substantial amount of Fame).
They can only be used in the Vault, and apply Pet Stasis for a lengthy period to stop Pets from destroying the chest and thus denying the player loot.
There are two grades of chest: Quest Chest and Epic Quest Chest. Epic Quest Chests contain far better rewards, but as a result are much harder to get.
If you spawn a chest and leave your vault (accidently nexus or get disconnected) then that chest is gone!
