Revived

How do I get to the demon lands?

The Orcs had a bag of infinite gold. At the prophet who sits in front of the garrison, you exchange it for boots of levitation. With wings.

If you defeated the Inquisitors and Paladins to the left of the castle, a ship should have become visible.

Put on the boots and walk to the ship directly on the water. The boots of levitation allow this.

And what are the Boots of Ada?

There are traveler's boots (brown) +25% movement range.
Boots of the open path (green) - remove the penalty for rough terrain.
Boots of levitation - allow crossing water obstacles (from land to land or a ship).