Grey Energon is like Red Energon, except it makes the user weaker, slower, and in some cases, dumber. It's also used for poisons mostly and if someone ingests it, they feel instantly tired, it takes a few minutes to even kick in. Note: Ventreus was hunting it down. At one time, the Vehicons captured Jazzimus, injected the stuff in him, locked him up, and then Elikeila infiltrated a prison, when she snuck in a Red Energon cookie. Unlike red Energon, it can only be a liquid, or a solid. It is highly susceptable to exploding if mistreated, even if looking at it the wrong way. When both Universes became one universe, and both Autobots and Decepticons fell, the remnants of both sides used it to poison both sides when they caught on to who made sides like the Knights fall. (Dark Knights, Grey Kn