"The Will of Ashan" - "Heart of Darkness" [2nd campaign, 5th mission]

In the previous missions of this campaign, I used Ornealla, and I didn't develop Arantir at all.

In principle, you can complete everything with Ornealla, and then take Holy Flame with Arantir. The main thing is to have more troops and transform them into undead from Haven; you can overwhelm them with numbers.:smile01:

Added 1 minute ago
And don't forget to transfer Ornealla's artifacts to Arantir before sacrificing her.