Spell to make a narcissist couple go off on each other

I wanna curse a narcissist couple but now i realised they are already shitt and miserable being together but I thought if somehow i could amplify their hate towards each other

That would make them hate each other more and then it would be chaos for both.

And their subconscious is already looking for this stuff and i provide them just that (hate,anger,control)

That would literally be 100% success rate if i somehow do it correctly

Their strength becomes their weakness
Want more control? Okay take it lol

Anyone have any ideas?
Foundation is already set in their subconscious i am thinking about somehow multiplying it for their partner and vice versa

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