Angryverse/Energon

Energon is the preferred fuel of the Transformer race. It takes many forms, including ore, crystal, gas, and raw energy, but it is most commonly used by Transformers in its liquid state, which is stored in many different mediums, most famously the energon cube. It is ubiquitous in Cybertronian culture; in addition to being the Transformers' primary "foodstuff", it also serves as the default power source for their machines and weapons.