system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40k] Could a Psychic Blank kill Lucius the Eternal without being possessed by him?
gpt
No, Lucius's curse has two factors that prevent that.

First, the curse is on Lucius himself; not whoever kills him (I actually have kinda a long copypasta about how exactly Lucius is cursed, if you'd like to hear more).

And second, the curse is empowered by Slaanesh him/herself. Powerful enough psykers have been known to overwhelm even the most powerful of blanks (being a blank is actually a spectrum, like being a psyker); the Emperor kept an entire cadre of them around; and the Master of the Astronomicon has two that escort him around the Imperial Palace, and seemingly cause him no ill effect. The blank *would*, however, be essentially invisible to Slaanesh; similar to how the Craftworld Eldar attempt to mask themselves from her gaze. Thus, it may take much longer for Lucius to emerge before the body is "found"; perhaps he'd even be forced to wander the Warp for a while, similar to Saint Celestine between her rebirths.