Armus was a malevolent entity created by an unknown race.
Armus was born as a by-product of a procedure in which a race of "titans" brought out from within themselves all evil and negative attributes that had bound them to destructiveness. The unwanted substance spread and coalesced into a dank and vile second skin. The race rejected this "skin of evil" and abandoned it on the barren planet Vagra II in the Zed Lapis sector.
Armus manifested as a black viscous liquid that could also assume a vaguely humanoid shape. Tricorder scans could not register the substance Armus was composed of. Armus was also capable of enveloping humanoids and incorporating them into the liquid where they would remain conscious while in liquid form. Armus was impervious to phaser fire, and Data theorized it was, in fact, feeding off of the phaser energy. Captain Picard also assumed Armus was immortal.
After the initial abandonement, Armus was left in a state of undirected rage. However when the rage was focused, Armus was capable of generating around itself an intense undefined force field. With this energy field it was capable of blocking sensor scans, communications, andtransporters. It was also capable of using psychokinesis and teleportation on at least humanoid-size organisms within the field. Armus was also capable of inflicting energy discharges that caused synaptic damage to ...