#I really want to write a fic where the jl (mainly superbat) help cap with saving the Rock and fail

[phoenixcatch7]

Cap marvel headcanons I Will integrate into a fic one day but also have Zero basis in canon to my knowledge (this ended up being LONG):

The living lightning is an ancient force akin to the speed force, and the 'true' guardian of magic, being possibly the first 'magical creature' ever created.

The rock of eternity only recently became based on earth, in the past several thousand years, with the planet's deities acting as mountains in the rain cycle - funnels to safely channel the magic back into the Champion. It's a fully symbiotic relationship that benefits the planet and its people immensely.

This means previously the rock has been based on alien planets. Previous champions are ancient aliens, many from species that no longer exist, either because the species died out or evolved into something unrecognisable.

The champion of magic may have inspired the oua (?), the creators and high council of the green lanterns. Ooh maybe an oua was selected as champion, which is how they learned of it!

The living lightning, when not in a mortal vessel, rests in the heart of the Rock in a large brazier, with a smoke lid of white edged with gold in a familiar pattern. It is tradition, or perhaps instinct, for a Champion to light the brazier whenever they visit the Rock. It will be lit for as long as the visit lasts, and be extinguished the next time they come.

Should it choose to take form, the living lightning resembles a washed out combination of each of its previous Champions. Its form is solid and clear, strong and made for battle, but distinctly uncanny. It doesn't leave its brazier, nor speak.

The 'ideal form' of a hero varies all the time, doesn't it? Especially if you're a kid still growing and learning about yourself and the world. Headcanon cap ever so subtly changes features sometimes. Gradually. Height and build changes sometimes. One of the league members has noticed but they really can't prove it to themselves and it's driving them crazy. Billy has no idea.

On that topic, the 'ideal form' also includes the clothes, right? The red costume? If Billy transforms with the intent of doing something outside his normal hero things (ie, attending a celebration), the outfit has every reason and ability to change to reflect that! Everyone expecting cap to show up in his normal gear and ready to throw a formal suit at him to wiggle on over his costume and he shows up in a red and gold set with a little one shoulder cape like 'yeah I have no idea either'.

Cap marvel Is An Adult. Billy isn't, but cap is in every single way that someone could count. This is probably canon but in some fics I think the jl forgets lol. It's still the same soul, just, with an adult filter instead of a kid one. However that filter manifests.

Not sure this is canon too, but the idea of the mind/soul/whatever of cap manifesting as this great impossible mass. A storm, or a tiger, or a barrier of lightning. This giant, untouchable, dormant mass of power and implied Danger™. Again, Billy has no idea. J'onn is eying warily from a very safe distance.

His wiki practically waxes poetic about his abilities and skills in strategy, mathematics, nigh precognition from ability to spot and manipulate patterns. Captain marvel is unbeatable at chess. Batman has lost to him. Billy cannot do fractions and it drives him up the WALL.

The champion, and ONLY the champion, can share his powers. If shazam wants a second champion he has to give a new set wholesale or convince the champion to share. Similarly, those patroned by the champion cannot transform unless the champion is also transformed. Because otherwise that would be too easy for Billy lol.

Every time Billy asks, tawky gives a different canon origin story. Billy has no idea which is true.

Billy's parents died accidentally freeing Adam on their expedition. Probably crushed by rubble :(. The wizard is the only one who knows and really isn't inclined to share, and Adam either hasn't connected the dots or never really noticed they were there.

Cap and Billy love each other, regardless of whatever version their whole thing is. They're the only reason the other remembers self care and that kind of self love, even if he's not sure he deserves it, makes a world of difference with how they portray themselves to the world.

Cap doesn't need to breathe to speak but he never remembers that and has repeatedly choked in water and space. Superman empathises but tries not to find it funny after the third time it happens.

Billy has showed the wizard memes.

The wizard internally refers to Billy as the 'sassy, lost child'. He has a pointy hat like any good wizard but refuses to wear one since Billy keeps asking him to, pretty please.

Cap once won an arm wrestle with superman by pretending to lick his hand. He didn't. Billy would have.

Cap marvel CANONICALLY bites but after the first time he regulates his jaw strength. Thankfully it was Black Adam so no one lost a hand. He had him in a headlock so who's fault was it really.

Ebenezer doesn't have a strong opinion on cap marvel either way. Billy thinks that's almost worse.

The living lightning isn't lightning. It was around before lightning. It is living, however. It is that 'living' that forms the main consciousness of the Champion form, in this case Marvel. Its not sentient or sapient itself, that's the vessel, but it is the building blocks of it.

In dc (again no idea if this has any basis in canon) magic is the fifth state of matter, above plasma. Yes this interferes incredibly with quantum physics and theoretical science. No the magic users don't know how it works either. No they will not help you they have their own research (into the exact same thing) to do.

If the Rock is obliterated cap marvel will die (along with pretty much everything else but irrelevant). However, if he manages to save the brazier, he will continue on. Magic as a whole deal won't be very happy and aeons of magical knowledge and history and artifacts will be lost, but cap will live and can rebuild from the ashes. The brazier is Heavy but enough super strength can move it if you don't mind bringing a chunk of floor. And the rock is so weakened it's literally falling apart but those are the right circumstances anyway so.