Being able to feed on Investiture was an aftereffect of the burden he’d once carried, the thing that had given him his Torment. He needed a power source that was potential, not kinetic. Scientific terms that, in this case, meant he was extremely good at leeching batteries or other stable sources of Investiture. However, something like an energy blast being shot at him or—unfortunately—the power of that sun wouldn’t work. Too intense, too kinetic. It was also storming difficult for him to get Investiture out of a person or another living being, requiring very unique circumstances.
