Azeroth DB
Mithril Lotterybox
Item Level 40
"Will always have a level 40 or higher Uncommon or better item."
Where to find it
No Azeroth Forever: World Recorder player has seen where it comes from yet. Azeroth Forever: World Recorder
WoW Forever item sources and crafting uses
WoW Forever bags up to level 30: slots and how to get themAdventurers’ notes