Construction and Siege
Underground Construction (p.106) 
| The vanilla DMG underground construction tables include races not present in the Oath-Bound setting. Entries for absent races do not apply. |
GMs should also note that some underground construction in Velland predates the Fall and was built to standards that current craftsmen cannot replicate. Velasian engineering — including hydraulic cements and structural techniques dependent on lost tacit knowledge — may produce underground works that appear inexplicably durable or sophisticated by post-Fall standards. What the characters are looking at may be categorically beyond what anyone alive could have built.
Construction Time (p.106) 
| The vanilla pricing tables are superseded by the Oath-Bound system tables, which reflect the post-Fall economic and craft landscape more accurately. The construction time principles apply; the costs do not. |
Entries for absent races do not apply.