Two things. Yesterday I was screwing around on Earth, ended up soloing a HoW patrol and opened the chest and got a legendary arm engram, when I went to turn it in, it turned into Khepri's Sting. If you don't know what that is, crouch and your turn invisible and if you hit an enemy in the back you deal x4 damage while invisible, primary reloads faster, and orb replenish melee as well. Needless to say, I am now putting work into my hunter. Second is during my first PoE run I had two keys, ended up finishing it no problem and when the floor opened (shocked me actually) I barely made it to the bottom in time and when I opened the crystal chest I got Gjally, just saw I got an exotic and thought I glimpsed the name and when I saw it I was ecstatic.