When Nate merged with alternate Nate to become a Shaman. The X-Brand defused, Nate’s body reaching critical mass due to his ambient energy Nate produced.
However, Nate can not really touch the greater portion of his powers without dieing in the processes. That’s why he died in battle against the Harvester.
So its basically, Ok you don’t have to worry about your body overloading itself in a few years worth. But don’t think about tapping into the greater portions like you did a few times. You can still implode, taking the Earth with you.
- Id