Dark Energy

Dark Energy is a form of energy that naturally permeates all space throughout the universe. It is normally unable to be detected by conventional means, and indeed its existence is still considered purely theoretical by various alien nations. On large scales, it opposes the force of gravity, causing the universe to expand.

Applications
Dark energy has been used as the primary energy production system by the Collective for many cycles, relying primarily on the usage of Dark Energy Reactors.

Dark Energy has also been harnessed for some forms of weaponry, though not necessarily deliberately; The warp cannon causes a tear in space time which seeps dark energy out into the surrounding area which causes additional damage to the surrounding area. It is also used in the Collective Dark Energy Blades which are extremely powerful close combat weapons that make Collective soldiers extremely feared in close combat.