today blizzard finally lifted the lid on diablo 4s new codex of power feature and its a bit like a spiritual successor to kanais cube from diablo 3 and the horadric cube from diablo 2diablo 4 game director joe shely and associate game director joseph piepiora gave a breakdown of the codex of power during a recent stream although there are key distinctions between the codex and the cubes before it its core purpose seems to be similar in principle to make legendary powers more accessible for builds the new crafting feature rewards you with a unique form of a legendary power called an aspect for every dungeon you complete the first timethe legendary powers can be from any class and youll be able to see where to find them in your codex so if theres a power youve had your eye on youll be able to go to its dungeon and grab it from there youll take the aspect back to the new occultist crafter in town and imbue any rare or legendary item with its particular legendary power overriding any existing powers once youve added an aspect to your codex itll be available to all of your characters making it a lot easier to build out and experiment with new charactersthat essentially removes rng from the equation when youre kitting out your build early on but later on item drops will prove valuable yet again because aspects from the codex of power will always roll to the lowest possible level meaning for example a power that increases an earth skills critical strike damage by 20 40 will always increase it by just 20 in aspect form youll have to resort to traditional loot if you want to minmax your gear thats different from diablo 3s kanais cube which always maximizes legendary powersthe cube also doesnt let you target specific legendary powers by completing dungeons it just lets you extract them from items and add them to your character without having to wear an additional item similarly with the codex of power youll also be able to extract legendary powers from items and turn them into aspect crystals which you can then add to a different item however it seems the codex wont let you affix legendary powers directly to your character so youll still have to be wearing an item to benefit from themi mentioned earlier that aspects will always be the lowest power version of a legendary but theres another significant limitation to the codex that ensures rng will always be king not all legendary powers are included in the codex its unclear how many are exclusive to item drops but diablo 4 game director joe shely said there are many many more that you can only find in the good ol fashioned grindin theory the codex will afford you the ability to deliberately build out a competent character to your exact liking earlier in the game while avoiding making random item