Dexcessa, the Talon of Slaanesh

It was at the height of Morathi's ascension to godhood that a drop of Slaanesh's own divine essence broke free from imprisonment and fled the cave between realms. Called the Newborn, this cursed hybrid was suffused with both the Dark Prince's power and the residual energy absorbed by Morathi herself, coalescing into twin beings that mirrored each other in body and soul.