Legendary Equipment

Legendary Equipment is the only equipment where Legendary Chaos Gems  can be forged. This is the reason why they are very important, in addition to often being very powerful items.

They can be obtained only through Alchemy. They require many ingredients from powerful monsters, and also require you to own certain items (which won't be consumed) in order to be able perform the final alchemy. You can learn more about this on their dedicated alchemy tab in game: Alchemy - Legendaries; or on the Legendary Recipes page.

Legendary Equipment with NO slot
You will NOT be able to forge any Gem on these.

Magic
Note: There currently exists NO Magic with a slot.