Marked Varanguard with Overlords of Chaos Battalion

[BaronBanana]

With how the Mark of Chaos works with taking models in god specific books, am I able to take the Overlords of Chaos Battalion as an ally choice and give my Varanguard a Circle while the Varanguard don't take up ally points due to the god specific keyword?

[Drib]

In addition to what JackStreicher already said:

You cannot take the Overlords of Chaos Battalion outside the Slaves to Darkness allegience, as it requires 3-6 Host of the Everchosen Varanguard.

[JackStreicher]

AFAIK all units in an allied battalion count as allies.

[EMMachine]

Maybe we should add the ruling itself.

Warhammer Community, Corerule FAQ, Page 10

Quote

Q: The rules say that a warscroll battalion can include allies and that they don’t count against the number of allies in the army. Does this rule only apply to battalions that share the same allegiance as the army, but that have units from two different factions (a battalion in a Daughters of Khaine army that has Daughters of Khaine and Stormcast Eternals units, for example)?

A: Yes. The faction a warscroll battalion belongs to is shown on its warscroll, above the title of the battalion. In addition, the battalion is assumed to belong to the Grand Alliance that its faction is a part of. Warscroll battalions that share the same allegiance as an army can always be taken as part of the army, and if they include any allied units, these units do not count against the limits on the number of allies the army can have (or against the points limit that can be spent on allies in a Pitched Battle). An army can include a warscroll battalion of a different allegiance to the rest of the army, but if it does so the units in it do count against the limits on the number of allies the army can have (and the points for the battalion and the units in it count against the points limit that can be spent on allies in a Pitched Battle).