Antithesis

The Antithesis, originally 'Antithesis to Succession Itself'(note the lack of a 'the') is the primary enemy of the Nonpareil. It is separated into portions, of which the only prevalent one during RP:ATOT was led by Viera.

Etymology
The word 'antithesis' is a synonym of 'opposite.' It comes from the Greek 'antitithenai,' 'set against.'