Immortality is meh.
So anyway, if I am ever immortal, I probably will summon Slaanesh.
Oh don't do that. Let me explain Slaanesh. He is the edgy-ist of edgelords. He is the God of 10th grader syndrome. He literally goes around saying "there is Evil bound into my hand" then starts masturbating right there at the poker table going, "It's not me, it's my EVIL HAND!" And just to be polite, we all ignore him.
We're like, "Dude, yer a god. That's special enough." But Noooooooooo... he's got to be the most SPECHUL of gods. He can't live without being the center of attention. He says stuff like, "I'm the god of surprise butt-sex!" Well, you know why? Nobody else wanted the job. Of all the portfolios you could have, there are REASONS nobody else is the god of those portfolio yet. I mean, even the god of darkness, madness, and evil looks upon Slaanesh and calls him a try-hard. I know he's got good self promotion skills, but TRUST ME, nobody likes the guy.
I mean, if you are LOOKING to crater your reputation, sure. invite him over, but trust me, it's just not fun.
How do I put this?
AH. I got it.
Okay. Imagine you walked in on your naked hot-step mom and your sister having sexy time on your bed. You brain would just disconnect and you would step out of the room and close the door, trying to figure it out. As disturbed you would be, there would be some part of your brain that said, "That was kinda hot."
Slaanesh WISHES he was the god of that.
No. Slaanesh is the god of walking in on a 38 year old, overweight, pimply, Otaku japanese guy who you never met before, naked, on your bed, having sex with a jar of mayonnaise while wearing your underwear over his head so he had to breathe through it. As you stare, you see he had a tattoo on his ass that is, for no possible reason you can fathom, a copy of his ass. You see a smudge on it that could be yet another, smaller tattoo on THAT ass or just a particulary strange looking double zit in just the right spot to LOOK like a small ass-tat, but you can't make it out from the doorway and there is no way you are going to get any closer to find out if he has an Ass-ception tattoo on his left buttcheek.
Slaanesh is the god of THAT.