Conradia is at the Damianite side of the Bronze Orchard, teaching a couple of new fifth-circle wizards how to do Planar Binding correctly. Conjuring potentially hostile outsiders is dangerous, so it pays to have the best teacher around. She is also the only seventh-circle wizard in the base, so she's the only one with access to Banishment. It's much more reliable than Dismissal.
She's planning on having her two students summon dretches as a practice run. In the case they get out (i.e. if one of them does something stupid and ruins the summoning circle), they can be easily dispatched.
She demonstrates how to create the circle of powdered silver, and how to create the sigils that would prevent the summoned creature from escaping, similar to a Magic Circle against Evil. It's possible to draw it in just ten minutes, but she shows them how to do it the formal way that's taught in magic academies, which involves a three and a half hour long ordeal of checking and rechecking the sigils and referencing them against diagrams.
She checks her students' work and nods. They followed the instructions correctly. It would have been very surprising if they haven't – you don't get to fifth-circle by being unable to follow step-by-step guidance.
Finally, she demonstrates to them the somatic and verbal components by casting the spell first. She waves her arms and speaks the words.
Lesser Planar Binding.