Have you ever gotten anything from the uncommon, rare or super rare drop categories? Any of the mount skins, exclusive armour or weapon skins (like the Seven Reapers pauldrons or the cloud chair/glider in the current chest)? Any whole black lion claim tickets? Home instance nodes? If so then you've gotten a 5th slot at some point because that's the only way to get those items. The first 2 slots are always a black lion statuette and whatever this chests themed guaranteed drop is (currently blue dye.) The 3rd and 4th slots are always random items from the 'common' category - the dye packs, wardrobe unlocks, crafting materials and other random consumables. The only way to get anything better, like the items which players are usually hoping for when they open black lion chests (the mount skins and unique armour/weapon/glider skins not available any other way) is to get a 5th slot. If you open lots of chests in quick succession you might not see it because it only shows up on the interface briefly and as soon as you use another key or close the window it's gone, but even if you don't see it in the window you can tell it's happened because that item will be in your inventory or unlocked in the wardrobe. (And if you have never gotten anything beyond the common items my question is why open thousands of chests? Why pay for keys or spend time farming them if you never get anything but the basic items, when there's more reliable and often cheaper ways to get the ones you want?) Mounts No. But outfits and weapons seems to drop often