Journey

After any response, he teleported, so there was simply no opportunity to engage in battle.

The battle's outcome also seems to depend on something. It seems he doesn't treat Necromancers the same way he treats others, like, for example, the Inferno Castle with its quest (the castle only gives a reward to those of its bloodline). Most likely, you can fight after escaping from the dungeon, but I don't remember for sure.
Which hero did you choose at the start?