@chronosapien234 I honestly don't know how to best answer that in technicality terms. I think that's something that the guys at Death Battle themselves would be best suited to provide the answer to.
They'd harvest energy to make weapons, then to decorate their bases with energy items. They'd use resources to feed and aliment their vehicles, using all of their resources raw like gems in SU, leading them to their current state due to greed and reckless use of their resources
