Unseen Form

One of the night sorceries of Sellia, Town of Sorcery. Makes the caster semi-invisible. While on horseback, effect extends to cover the mount. This sorcery can be cast while in motion. The Sellian assassins considered every option that aided their dirty work.

Where to Find the Unseen Form Sorcery

Found in a tower near the Bower of Bounty site of grace on the Altus Plateau. The tower is invisible until you complete the puzzle, in which you must touch three seals — one is visible right next to the imp statue that informs you of the puzzle, while the other two are located nearby. The final seal is hidden in a rock that must be attacked before you can interact with the seal.