Archdevil

From the context and other parts of the work, we are to understand that the demons here described are the personal friends of our sovereign, and that the archdevil was the mother of our sovereign.

Source: wiktionary

In short, it is purely the work of the devil that they are doing, and especially that of the archdevil, who presides at Muhlhausen, and directs nothing but robbery, murder and bloodshed.

Source: wiktionary

A spirit of ultraism seems to pervade the whole community. The language of Milton's archdevil "Evil, be thou my good" is the creed of modern reformers, or, in other words — anything for a change. What is to come of all this, I have not wisdom even to guess. It is an age of transition and whether you and I live to see the elements of the moral and political world at rest, is, I think, extretmely doubtful.

Source: wiktionary

The bishops in question were described as archdevils, priests of Baal, standard-bearers of the Balaamites, and children of perdition.

Source: wiktionary