#Namo would be furious at him but it's still much better

[eri-pl]

LaCE (but not the part you think)

So everyone knows how "Laws and Customs of the Eldar" has things about elven marriage. But

It also has other, more interesting things. Namely, stuff about eElven souls. (Yes, I don't like shipping, I find it boring, your definition of "more interesting" may vary.)

bad: it has the version where Elves are reborn as babies, not reembodied as similar to when they died. I don't like this.

fine, but not fic-friendly: spirits in Mandos cannot talk with the living. I'm not saying they should a full-on social life, but I love the drama of "you have to talk through your situation with that person before you get reembodied", it's too useful sometimes.

extremely underutilized in fics and HCs: houseless spirits. Creepy elven ghosts who decided to not go to Mandos. And get more and more frustrated, and want to steal people's bodies. And Morgoth, and later Sauron and his top minions, can bind them via necromancy.

I'm not saying: ghost of Maedhros, but come on. (Some dark-ish ideas ahead)

He is so angry at Eonwe, he wouldn't want to have anything to do with the Valar. Anything. He would stay, wallowing in guilt, avoiding his brother whom he abandoned (do Elves see disembodied fear? If not, Mae could as well follow Maglor for some time. And/or E&E).

(Also, if he went to Mandos, wouldn't the Valar banish him into the Everlasting Darkness? He doesn't know.)

Anyway, spiralling into guilt and despair and anger. Trying to posess someone, to have a body to be able to help Maglor, who is messing himself up without him.

He refuses the call of Mandos all the time.

Slowly, the shadow grows... One day Maedhros hears a very different call, one he is not able to refuse. A familiar voice greets him, his elongated vowels sweet like poisonous honey. "Maitimo. It's been a long time since I had the pleasure..."

(ok, I'm not sure if it's canon-confirmed that Sauron was the one doing the torturing and not Morgoth himself but it's a popular assumprion) (Anyway, basically Thrangorodrim 2.0 but you are dead and Fingon isn't coming.)