On Lucius' page it should be described that his possession affects even soulless beings such as necrons.

[FanSyst]

This is not something new, but I think the page should describe it.

Eventually, on a nameless moon near Damnos, Lucius is cut down by the shapeshifting Necron duellist known only as the Phasing Sword. Not even the Necron’s body of living metal can prevent the Slaaneshi champion’s strange possessioncurse from taking hold, however, for it takes a cold pride in its victory, and that is the seed of its undoing. Lucius is reborn inside his killer within days, the xenos warrior’s body drizzling away to reveal the twisted swordsman, as arrogant and maniacal as ever.

 

[AbaddonTheDisappointment]

I agree. On the page it should probably just say "anyone who kills him and finds the slightest satisfaction or enjoyment in it will gradually transform into him and he will absorb their soul into his armor, even if they lack a soul" or something similar.

 

[PsychoWarper]

Seems good to me, Lucius still a bitch tho.