Carl's fallback order at the Reaver castle once both missing warlords' adjutants turn up on site.
After Princess Donut confirmed via power view that the invisible figure at Tart's shoulder was Fopsy, adjutant for The Dream, Carl messaged the team: both adjutants of the missing warlords were present, so the idea that this might be a trap was starting to look far more likely. Both Warlord Fang and Epitome Tagg could be somewhere on site. He called an end to fucking around and ordered Plan B.
Under Plan B, Juice Box does not head for the throne room. Instead she takes Doctor Bones' Paper Map fix on Louis's coffin-sized cell, shifts into her ethereal form, goes fully invisible, and signals when she has him.
The contingency rescue plan triggered by evidence of a trap at the castle.
Also appears in books you've already read — spoiler-safe to their endings: