Attaching multiple HQs with different marks to an unmarked unit

[CridiDeal]

Would it be possible to attach a MoN-Lord and a MoK-Lord to an unmarked unit?

[Daemonette666]

I checked the exact wording in the Chaos Codex, and there is nothing to stop that from happening. RAW = OK.

Using the implied theme of the Chaos Codex, it seems implied that there would be an animosity between the 2 ICs if they were in the same unit. RAI - probably not.

[Demonus]

absolutely nothing wrong with it as the unit is not marked, you can add whomever you want.

fluff wise, Khorne and Nurgle have less issues than say Khorne and Tzeentch or Khorne and Slaanesh.