I have a question about Power Stance Skill book.

After getting the quest, Talk to 4th job instructor, then talk to Spiruna. the next step is find the Lycan's plan.

Is this Lycan's plan dropped from normal lycan that can be found in elnath dungeon?

Hunt for "Crimson Balrog's Proposal" storybook from a Crimson Balrog, then talk to your 4th job instructor.

Now talk to Spiruna found in Cloud Park in Orbis. Give her the "Crimson Balrog's Proposal".

She will ask you to hunt for Lycanthrope's Plans from Lycanthropes.

Talk to your fourth job instructor again.

Venture to El Nath and talk to your 3rd job instructor. He will give you another quest to find a Gold Medal.

Enter the El Nath PQ and complete it successfully to obtain the Gold Medal.

Return to your fourth job instructor, and he will trade you a skillbook for Power Stance for your Gold Medal.