"The Legend". Problems with the walkthrough.

The issue with the troops has been resolved. It's amazing how easily I can defeat "strong squads." I've even formulated a rule: the danger of a squad only affects the losses. But this is only possible if I have enough resources for a "black hole" at the beginning of the battle. After that, the battle becomes much easier. I also defeat "deadly" squads, but at the cost of half my army. I checked out Karador's army. There's nothing special about it. I think the only difficulty is the crystal. Well, destroying it will indeed be a problem. But I can handle it with two types of unicorns and inquisitors. I hope so. What worries me more is how to complete the quest for the elven bard who asked me to avenge his beloved. Where is her grave?