The atmosphere between them got kind of awkward after Alden's threat, although they had no reason to start a war with each other at the moment. However, they were not the Duke of Nightwind. If Vance decided to start a war with Deathfall, then they had no other options but to oblige.
This was what Alden warned them about. He was asking them to relay his threat to Vance so that Vance would think twice before starting a war to Deathfall. Even so, silence fell upon them as they had no ideas what to talk about.
Alden had cracked open the ground to reveal the underground tunnels and dropped down into it like it was nothing. Melva shrieked in shock at the sudden big hole appearing under her feet. Thanks to Davis' inhuman reflexes, he managed to stop Melva's fall and support her weight by grabbing her hand and lowering her down slowly until her feet touch the ground.