If it's just the hezrou, the fort can maybe handle it with some casualties but no serious operational consequences, but hezrous are only mostly solitary and you can't rely on demons doing what they mostly do. The commander gives the order to read off a Sending scroll calling for a strike team before he heads out to be ready to meet the thing in battle.
Venn does end up managing to draw the last game that they play, which she's very happy about. She leaves to go help Espina (Lt.) with the demonology class (it's Quasit day) and then hangs out in the mess hall playing her harp and chatting with people who swing by until it's time to do her evening healing.
One of noon patrols got ambushed pretty bad, and she ends up needing to use most of her songpower for the day patching them up. (She really can't wait to get her third circle spells - there's one Stef showed her that would be so useful for this. She knows she's close...)
Ah, fuck.
She pops to her feet and looks around to see if anyone knows what's happening.
No reports have made it inside the fort, yet, but someone on the parapets is clearly very agitated and everyone's running for their armor and weapons, stew abandoned on the tables, the people she just healed refusing to wince as they form up. Grec charges down the stairs hollering for all hands against a large mixed attack, with the Commander following, slowed by his mail.
"Bartra, get the scroll."
Bartra accepts the key out of Grec's hand and goes for the lockbox and when he starts to read the scroll it blows up in his face.
"Give it to Bartra's bird, it can make it to the next fort with a note -" He grabs a corner of destroyed scroll to scrawl on. The snowy owl hops anxiously on Bartra's shoulder.
She holds out her hand for the bird to land on, projecting a calm she doesn't exactly feel.
Invisibility.
"I can spare another casting if someone wants one."
"Bartra himself." The next patrol to come this way might spot the bird dead in the snow but they might not and he's on buffs anyway. And then Grec's out the door.
Barta can have an Invisibility, and then Venn puts one on herself and heads outside.