Dark Energy is an ore that is found in the overworld. Unlike regular energy it is very unstable and if touched by the Player, it will give them the poision effect. It is very dangerous but can be mined if your wearing a Gas Mask.
Although dangerous it can be useful with explosives because it is radioactive.
If you place it on the ground and light it with a lever it will explode. you can make a very deadly TNT known as the dark matter TNT its power is unstable and could destroy the world of minecraftia and spreads radio active substances that will kill you in one minecraft day WARNING! This explosive is highly unstable and destroys good energy!