Notes: Post-MWPP era. For lycoris.
Toxic
Lucius tires of light. He tires of his own name, Latin for "light", and he tires of his fair hair and even lighter skin. He tires of perfect, cold Narcissa with her ivory skin and white-blonde hair, and he tires of those people on the side of "light", who always win.
Lucius can't resist the dark. When the Dark Lord beckons him, he joins to feel the darkness of corrupt power and lies wrap around him like a second skin, comforting and smooth. He joins to live at night, to bring darkness into other people's lives by using their precious light against them.
When Severus Snape kisses him one night after another mass murdering of Muggles, Lucius welcomes it. He has always been fascinated by Severus, with his dark hair and eyes and background and demeanor, and he lets the darkness run through him and into him and around him and tangles with it and within it. Lucius isn't surprised when sex with Severus feels better than anything he has ever done with Narcissa. He has always loved the dark, after all.