|Skill and improvement|
This description is still missing.
- You can turn walls to suit your needs.
- You must repair any damage on the portcullis with a slate brick before improving it.
- Activate a slate brick, right-click the portcullis and select Repair or Improve.
- The effective quality of the slate brick is affected by its damage and your masonry skill, it must be higher than the portcullis' current quality.