The Mind Flayer in the Suit

The Mind Flayer in the Suit is the mind flayer Chernobog, Phasirru, Khindy, Chidili, Abussa, Pamalvu, and Boron were sacrificed to. The Mind Flayer in the Suit wears a sharp suit with a squid patterned bowtie. The Mind Flayer in the Suit experimented heavily on all members of Chernobog's squad, and experimented on two mind flayer tad poles. The only altered tad pole to live through ceremorphosis was one named Venchinull that would live the next 20 years believing it was Chernobog.
Redacted tracked him down and claimed his vengeance several years after the end of The Age of Coalescence.