Invisibility (Skyrim)

Invisibility is an Expert-level Illusion spell in The Elder Scrolls V: Skyrim. Casting it renders oneself completely invisible for 30 seconds or 75 seconds when Dual-cast, with a base Magicka cost of 197.

Breaking the enchantment
These actions break the invisibility spell. Actions such as preparing spells, drawing weapons, consuming items, jumping, or swimming do not break the enchantment.
 * Swinging a melee weapon
 * Firing an arrow
 * Opening a door, chest, or container
 * Pickpocketing
 * Stealing
 * Activating conversation
 * Casting a spell
 * Picking up objects

Sneaking

 * While invisible, the Dragonborn can still be detected by the sound of their footfall. Investing perks in Sneaking or using the Illusion spell, Muffle, can remedy this.
 * Due to Chameleon being removed, Invisibility is one of several ways to cloak movement. Another channel exists through the Daedric artifact Ebony Mail which grants a shrouding effect similar to the previously known Chameleon effect, in that the wearer is partially shrouded from sight when crouched.

Spell Tome locations

 * Drevis Neloren sells this spell once the Dragonborn reaches a skill level of 75 in Illusion.

Videos
A video showing the spell being cast can be found here.

Bugs

 * When equipped, the invisibility spell is simply a static orb and has no form of casting animation. This is purely an aesthetic bug however players may find it a minor annoyance.
 * When activated, the eye textures on the player somehow break. This is also an aesthetic bug and causes minor annoyance. However, this can be fixed by using console commands, exiting the game then reloading, or becoming a werewolf and then returning to human form. It also can be avoided by wearing an item that replaces the textures such as (Dragon Priest Masks and Nightingale hood).
 * Sometimes Adept and Expert spells will not be purchasable or visible in Drevis's shop. Making it so that you cannot buy the spell. However the Master spells are still available after the Illusion Ritual Spell.