Illusion Ritual Spell

It is the master-level spell-acquisition quest for the Illusion skill.

Walkthrough
It is obtained via a third conversation option from Drevis Neloren (located at the Hall of Countenance at the College of Winterhold) once level 100 skill level is achieved.

It involves finding four Master Illusion Texts scattered throughout the college that are only visible and obtainable through the use of a novice-level spell called Vision of the Tenth Eye that Drevis Neloren teaches you during the quest.

The books are located in the following areas: When the books are returned to Drevis, the four books will be removed from your inventory and the Spell Tome: Hysteria will be added.
 * 1) Hall of Attainment: Go up the stairs to the 2nd floor. It's under the bench on the left, at the landing.
 * 2) Hall of Countenance: Go upstairs to the 2nd floor. It's in the 1st room on your right, which is a storage room with crates and barrels. The book is on a barrel towards the back of the room.
 * 3) The Arcanaeum: Once inside the Arcanaeum, pass through the archway into the library proper. Before you get to the three steps down into the center, turn left into the outer ring. The first table with two chairs on the right hand side is where the book is.
 * 4) The Midden. It will be in the middle of the table to the left of the Atronach Forge.

The quest-specific dialog options are available only when all 4 books are brought to him, and he says "Yes, very good." "Here, then, is the first of the illusion spells you sought." Drevis never does give you the second, third, or fourth spells, but they instantly become available for purchase from him. They are as follows: Call to Arms, Harmony, and Mayhem.

Trivia

 * The books are only existant when the new spell "Vision of the Tenth Eye" is active. If one were to place an item where a book would be, the item will not be placed on top of the non-visible book, it will simply sit on the surface it was placed, and clip into the book when the spell is activated.

Bugs

 * It may happen that one of the Master Illusion Texts will not be in the location mentioned in the walkthrough above. This happens if the player accepted the quest Arniel's Endeavor while looking for the books.
 * The player will not be able to start the quest until after completing the Cleansing one also given by Drevis.
 * If you click read, then take 4 times fast, you can end up with Master Illusion Text (2) and you will not be able to complete this quest.

Ритуальное заклинание Иллюзии (Квест)