If the Herald of Slaanesh from this Formation is a Lesser Locus of Grace, Greater Locus of Swiftness, or an Exalted Locus of Beguilement, the special rules associated with that locus affect all units from this Formation within 12" of him. If such a unit is also affected by another locus, they will receive both benefits.
Building an army? Create, validate and share your list with New Recruit, army builder for Warhammer 40,000 7th Edition and many more games.
Try the builder