Magnus’s RPG empire on the portal.

He took a hit – 10 HP, he has 30 HP left, he recovers and attacks you, but misses.

I know, but it's a mental illness in a way. Considering that in our RPG, cannibalism is somewhat similar to vampirism, because the locals are unlikely to understand that it's normal to eat a peasant. ;)
So, we need to heal, go to Urgash's altar, and sacrifice a peasant.