What it does
"Locus of Slaanesh" isn't a real Magic keyword or ability—it appears to be a mix-up, possibly referencing Warhammer 40,000 lore that didn't make it into the actual Warhammer 40,000 Commander decks. There's no card or mechanic with this name in Magic: The Gathering.
If you're thinking of something Slaanesh-related, the relevant card is Slaanesh, Dark Prince from the Warhammer 40,000 Commander set. Its ability lets you draw cards and gain life whenever an opponent loses life, with a built-in tax to deter abuse. That's a "punisher"/value engine in multiplayer, thriving in pillow-fort or aristocrats-adjacent builds.
Double-check the exact card name you're after—if you can confirm the wording, I can break down the rules nuances and Commander applications precisely. Locus terms do exist (e.g., Eldrazi "locus" lands like Eldrazi Temple informally), but not under this name.
Iconic cards with Locus of Slaanesh
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