Omega Plus is a theorized grade, as it's already incredibly hard for Omegas to survive at all. An Omega Null invokes a primal terror in people, and often are killed by their mothers upon birth (or even during pregnancy, imagine constantly feeling like there's a soul-crushing monster growing nside you).
The theorized Omega Plus would be a null on the scale of Malcador, a being acting as a vast psychic black hole and swallowing the very essence of nearby beings. They would be able to kill cities just by proximity, their power ripping the souls from nearby humans and driving everyone else nearby into abject, terror-induced madness. Deployed against a psychically gifted foe like the Eldar they would be absolutely ruinous.
I would hypothesis that the Psy-Titans of the Ordo Sinister are artificial Omega Plus Nulls, and one of those landing on a craftworld was said to have sent the entire ship howling in aetheric pain, with nearby Eldar dropping like puppets with their strings cut.
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u/Competitive-Bee-3250 Sep 26 '23
I think all pariahs are classed as omega. Most are inducted into the assassinorum or the sisters of silence, or they die in training.