Cain led Prana outside so he could experiment with various spells and see what worked best for her. Since they're still in a group, he can simply share it with her and see what she prefers.
"Alright, the first spell for today's test will be [Crushing Tentacles]. I'm hoping that you can use them as vines and control them freely." Cain demonstrates and a dozen long Tentacles extend from his arm and wriggle around the area, looking for targets and waiting for orders.
He can control them, but not precisely enough to write with them or perform other such delicate tasks.
"Those aren't bad. More like octopus Tentacles, but with beaks inside the suckers." Prana says, grabbing one to admire the design.