is this item possible to make?

Chaos stone , gives hero chaos dmg, as long as equipped...

Well, what you could do is make 2 identical heroes that gain exp and stats as the other does, but one with choas and one without. Then you could just switch between them if they had the item. But theres no way to give a unit choas damage that i know of right now.

Yeah you can't toggle their attack types.

that should be in the new world editer:foot:

Nope, I'm pretty sure they're sticking just to the features that should've been in the game in the first place.

Yeah bliz doesn't want to do something for us that we can already do on our own. They're lazy and most of us are too, but when we find a work around to something that hasn't been discovered yet, we tell everyone and bliz hears about it and it goes on from there.