I have been playing online a bit on PS4, and I see legendary gems on other players with insane amounts of damage added to them. How is this done? Kanai's cube seems to only add stats according to gem type (int, str, dex, etc.) and it doesn't seem you can enchant legendary gems. What am I missing here? How do you add the massive damage to legendary gems? Seems like this is the only way you can do anything in the higher level rifts.