Hi guys, im in the process of crafting the legendary backpiece 'Ad Infinitum', and i have almost completed collection 3 (just need the research book). I have two questions: The first question is for ad infinitum collection 4, how do i unlock 'theory of ad infinitum'? wiki says:"Talking to Kelvei, the Legendary Observer after crafting Unbound.The item can be acquired only if the Legendary Backpack: Ad Infinitum collection hasn't been unlocked and if the item is not in inventory." I dont understand line 2 (in bold). Can someone please explain to me. thanks a lot Question 2:Charged Archdiviner's Mallet collection wiki says:"The opening you will need to jump into is located in the central room of Thaumanova Reactor. If the hole is blocked by a forcefield, you will need to use a Matrix Cube Key on the nearby console to remove it. You will receive the Charged Archdiviner's Mallet as you land on the platform with the Defeat the misplaced steam ogre event." To unlock the charged Archdiviner's Mallet, do i need to simply jump into the Thamanova reactor after unlocking with the matrix cube key? do i need to the "the defeat the misplaced steam ogre event too?? Thanks a lot