Magnus’s RPG empire on the portal.

Hmm, is this shield on all sides? Archdevils! We're looking for a weak spot in the shield!

The shield completely surrounds the walls. But gradually, the archdevils find a weak spot; one tried to get through, but he burned. Then, a gate opens from hell, and succubi start pouring out. They began to attack the shield. The shield loses strength, and a breach appears. A succubus rushes through, but falls into the lava.
The city of the dwarves is the same as in Heroes 5. The lord tells you: find the elevator. You can't enter the city.