The Mark of Slaanesh is a Mark of Chaos granted to those Champions of Chaos who have sworn their loyalty to the Chaos God Slaanesh, the Lord of Pleasure. The majority of those blessed with the mark are the Chaos Space Marines of the Emperor's Children Traitor Legion. The most common bearers of this Mark of Chaos are the Noise Marines of the Emperor's Children. Recipients of Slaanesh's mark are marked by the Lord of Pleasure, either as a perfectly formed mark upon their body or a more secretive but no less permanent mark upon one's soul. Characters who bear this Mark must attempt to seduce those they encounter to the paths of lust and greed. When gifted with the Mark, the bearer becomes addicted to sensation of all sorts and craves new, more extreme pleasures. The bearers of the Mark of Slaanesh's excesses find their quest for sensation made easier by the supernatural glamour that cloaks them, unnerving and disturbing their adversaries. Bearers of the Mark of Slaanesh are fearless and possess the Warp Scream ability, in which the individual emits a piercing supernatural cry powered by Warp energies that disorientates his foes.
- Black Crusade: Core Rulebook (RPG), pg. 82
- Codex: Chaos Space Marines (6th Edition), pg. 30
- Codex: Chaos Space Marines (4th Edition), pg. 25
- Codex: Chaos Space Marines (3rd Edition, Revised Codex), pg. 59
- Codex: Chaos Space Marines (3rd Edition, 1st Codex), pg. 29
- Codex: Chaos (2nd Edition), pg. 27
- Realms of Chaos: Slaves to Darkness (1st Edition), pg. 41