Buff
Veil
There are two versions of this buff: Veil and Perfect Veil. The Champion under either of these buffs cannot be targeted by the enemy.
If all remaining Champions on a team have an active Veil or Perfect Veil buff, the enemy will not be restricted in targeting a specific Champion.
Veil buffs will be removed when the affected Champion uses an active skill, but Perfect Veil buffs will not be removed. Also, Veil and Perfect Veil buffs decrease incoming damage from area-of-effect skills. Veil reduces incoming damage by 7.5%, and Perfect Veil reduces incoming damage by 15%.
Finally, Veil and Perfect Veil buffs cannot be stolen by an enemy Champion with a skill that allows them to steal buffs.
What the game's own status effects screen says
In the game data this effect appears as Invisible1.
Champions that apply it
12 champions have a skill that applies Veil, according to the effect lines in the game data. This lists who applies it, not how reliably: chance, duration and resistance are on each champion's page.
Corpse Collector
Duchess Lilitu
Dyana Gloompiercer
Excruciator
Fang Cleric
Hill Nomad
Infernal Baroness
Lifetaker
Mistress of Hymns
Necrohunter
Shadowbow Tirlac
Steadfast Marshal
The description is the game's own text. It has not been tested in battle here, and the game's wording can be loose (for example about numbers that differ between versions of an effect). See Data quality for what has and has not been checked. Found a mistake? Use "Report a problem" at the bottom of the page.