In MoM you could create magical artefacts. Now, in Elemental you can create magic armor and stuff, and I would hate to see my Champion be killed and his stuff taken. If his stuff is taken and then used against me, I would hate that even more. I would want it back. If you could create sufficiently powerful Artefacts (I am still hoping it will be included at some point) you could have all factions wanting it - so One Little Ring could be the cause of a huge war.
And if that stupid brigand leader kills my champion, steals his Magic Sword of Chopping (which unfortunately did not protect against an arrow through his chest) and becomes a power in his own - how cool would that be ?