"Someone was looking for you," a drunk, muscular man applying some paint to his fingernails says to Belmarniss as she walks by. "Drow girl."
"Stunning Barrier." And he flies right up to it; it slaps him with its tail and then convulses. "Enthrall." He starts flying away from the ship.
(He can hit it in the eye. And in the gills. And in the webbing where its flippers leave its body.)
"Aggressive Thundercloud." She stays out of bite range; all her good stuff works at a distance. "Admonishing Ray."
Controlling the cloud and her flight at the same time is distracting; she's wobbling in place, but pops upward another bodylength when it lunges. The cloud chases the serpent. She hits it with another batch of rays. When Haste wears off she recasts that for everyone close enough to Hagan, who needs it most.
He's flying along shooting at it. Most of the arrows glance off harmlessly even though he's very, very good. "We're not going to kill it, pretty sure."
"Wouldn't be admonishing it if I thought it needed dead. Low on good stuff, though, was prepped for shipboard combat - uh - Web?" She attempts to stick it to the seafloor.
"Oh, that's mean." She can do true strike for some crossbow potshots at it so it'll be ready to get out of here as fast as it can once it's free of the web.