Also...
Yes, Brue could have spent the short rest determining the properties of the weapon. Additionally, Gnorth could have used his Song of Healing feature to boost Brue's HP gain from her HD expenditure during the short rest. Since the rest occurred during a long vacation period, I'm willing to retroactively apply both as I don't think people were really thinking about what they needed to do on their short rest or their capabilities.
- We can assume that Brue has 3 more HPs, which is what she was short from being fully healed after the short rest. That brings her current HP total to up to 9.
- Brue's maul is known as a Hammer of Earthen Embrace. It is a magic weapon that does not require attunement. On a critical hit, if the target is standing on the ground, it must succeed on a STR save or suffer the restrained condition as fingers of dirt/mud/sand/stone rise up from the ground and wrap around the creature. The DC for the save is equal to the total damage dealt by the critical hit. The effect lasts for one minute, although the target can repeat the save at the end of each of its turns.