You were into mysticism and other devilry. You had a bunch of books about demons on your shelves. You have recently studied Ars Goetia.

You have studied one of the demons, Stolas, in detail. Stolas is the thirty—sixth spirit, a great and powerful prince. Appears first in front of the caster in the form of a mighty owl, which symbolizes hidden wisdom and knowledge in the dark realms, but then takes the form of a human. He teaches the art of astronomy and the properties of herbs and precious stones. He rules over 26 legions of spirits.

Late in the evening, You've prepared everything you need to catch this demon., sat down at the table and waited for the full moon. After reading the spell, your whole room glowed red. You've seen the terrible black shadows of an Owl with red eyes.

He was standing in front of you.. Stolas himself. At first he looked like an anthropomorphic owl, but then he took on a human form, with owlish features. He looked like a young man dressed in expensive Royal clothes. There were owl feathers on the floor.

—"I'm sorry for this mess."—He said in his velvety voice and chuckled slightly. His laugh was like an owl's.