(yeah i'm doing fine. just busy irl)
anyway—prior to v9 i would have said definitely they both wind up mortal again, but then v9 threw its curveball of overtly questioning the premise that everything must die. immortality for ozlem has hitherto been framed strictly as a curse, because ozma sees it that way; i think it remains to be seen whether salem feels the same, because:
a) "if she were to turn humanity against Light and Darkness, she could rid herself of their curse, or at the very least… she could make them suffer." <- even before her rebellion, salem had begun to accept the possibility that she might never be able to make herself mortal again if she defied the brothers, and she made a deliberate decision to fight back anyway.
b) it has been so long that i have to imagine it is hard for her to even conceive of dying as a real possibility anymore? so even if she theoretically would welcome the chance to die i'm skeptical that it's more than a "what if the world was made of pudding?" type of nonsense hypothetical in her mind.
and c) everything points to "salem wants to change the world" being the correct view, with salem herself envisioning a "new world"—and in the event that is true, salem isn't suicidal full stop.
the thing that makes her immortality a curse has always been isolation and exile, neither of which are innately because she's immortal. indeed the very first thing salem used her immortality to do once she decided to live was connect with people and build a coalition. the reason for her exile in the present is not her immortality per se but the fairytale narrative construing her as the Great Evil. becoming mortal again won't materially change those circumstances.
ozma is in a different boat because, as you note, his form of immortality is bad per se—fatal to his hosts and torturous for him. we have however seen that a living soul without a body will just manifest a new body, both on remnant (penny) and in the ever after (ruby isn't just magically healed in the tree—her whole self is remade, hence the burning rose returns to her in the end—she's disembodied and remakes herself). so the immediate concern with oscar and ozma is to divide their souls, and i think there are a few of possibilities as to how:
- literal ascension via the tree
- the sword of destruction
- silver eyes as the mirror revealing what is true (two, not one)
- salem
- some combination of 2-4.
from that point the crucial question is whether separating ozma and restoring him to his own body oncedoes or doesn't break his cursed reincarnation forever. if it doesn't (or if he isn't willing to take the risk that it doesn't) then… frankly the simplest and surest way to put an end to ozma reincarnating as a parasite forever is to make him immortal the way salem is immortal. if his soul can't die, he can't be bound to another by light's curse. it is death that empowers his curse.
so to take away what gives light power over ozma, give ozma infinite life. right?
which… i mean, the well of creation gave salem infinite life; she hoped that the pool of grimm would take it away; take from an infinite quantity, an infinite quantity remains; this force of pure destruction could not destroy, so it created… it's possible for two souls to be bound together as one and it's possible for one soul to be divided into two. the possibility of salem dividing her infinite life in order to share it with ozma isn't exactly a leap.
certainly i wouldn't rule out a straightforward ascension through the tree being the answer—it is kind of the obvious course—but i've been rolling dark's parting words to salem around in my mind a lot since v9. "still making demands of your creators?"
that rebellion ended in crushing defeat because they tried to fight back with the gifts the brothers gave them—power that did not in truth belong to humanity, because those gifts were not freely given. this is a lesson salem took to heart, hence her insinuation (in WOR) of aura/semblances being much greaterthan mere magic, cinder using grimm (a kind of power salem claimed for herself after the brothers abandoned it) to mediate her inheritance of the fall maiden (a mere remnant of god-given power bequeathed to modern humans by light's champion, which salem has repeatedly warned cinder to be cautious of), and her recent experiment with combining silver eyes with grimm.
presuming salem is involved in the separation and breaking of ozma's curse at all, i think it's deeply unlikely she would be willing to trust the tree to just fix everything; i think there's a not-insignificant possibility that she has met the blacksmith herself before and may be factoring what she knows about the tree and/or the brothers' history into her plans, but if so it would be more on the level of knowing the brothers are finite and broken, not expecting the tree to save her.
(sidebar: there's an expectation across a lot of the fandom now that the brothers can/will be 'defeated' by tagging in the blacksmith to scold them for being naughty, and that is just… not going to happen. lol. the blacksmith makes it crystal clear that neither she nor the tree can or will intervene, and while the brothers need to ascend and that's the obvious outcome the narrative is moving toward now, convincing light [and dark if he's still around] to do it is a problem remnant's people are going to need to figure out for themselves. also the fandom-wide treatment of the brothers as spoiled little boys who just need mom to scold them is both inane and, frankly, misogynistic—because "well, the brothers are petty assholes but salem is just a spoiled bitch throwing a tantrum because they didn't give her what she wanted, and actually all her problems are self-inflicted" is an outrageous position to hold about a woman hating the genocidal monsters who murdered an entire planet to spite her. and then the cherry on top is anticipating that the conflict will be solved by way of "mommy" swooping in to clean up the mess her silly boys made. come the fuck on.)
anyway, i figure salem will be stridently in the camp of "no, we need to forge our own path." ozma, likewise, i can only imagine feeling extremely dubious of just putting his life into the hands of any god after what light did to him—let alone a god who is completely unknown to him. if he and salem think there is even the smallest chance that the two of them can break his curse by working together without divine intervention, i… think that will be Plan A for sure. after all, THIS is how ozpin closes out 'fairytales of remnant':
One interpretation of this story focuses on the fact that the people caused the problem in the first place. But in my view, it is only natural for us to want to bring more light into the world and “reach for the sun.” And on the brighter side, if you’ll excuse the pun, people were also part of the solution. They not only replaced the sun, a celestial gift from the all-powerful God of Light, but also improved upon it through their own ingenuity. Most importantly, they could not have accomplished this magnificent, godly feat without uniting for a common purpose in a way they never had before.
The world once was divided between day and night, light and darkness, but by coming together, and overcoming their inherent jealousy and resentment, people made the darkness just a little bit brighter for all.
a parable about humanity claiming the powers of their creators to perfect their own design; a parable about the world coming together to replace their divine gifts, and in doing so create a better world in divinity's absence. like i'm always saying, ozma's zealotry is grounded in fear—in his terrified certainty that the brothers are all-powerful forces of nature who cannot be fought—but the world salem aspires to create is the one he dreams of too, in his heart of hearts.
as for oz becoming a faunus—i honestly would not be surprised if he did? both thematically (the faunus in the myth are liberated through transformation into their true inner selves -> ozma must be liberated from oscar through transformation into his true self; the faunus mythically participate in their own creation and in doing so free themselves to choose their own destinies, making faunus the symbolic if not literal triumph of salem's rebellion) and, if i'm correct about faunus having been created by salem's transformation in the pool of grimm, also mechanically (in that event she would be the literal god of animals and manifestation of animal-like features representing the inner self follows the metamorphic pattern she created, so if it's predominately her magic mediating ozma's transformation/restoration then it would follow for him to become a faunus.)
but if he does, i think what he'll end up with is an avian trait—like trust love ("if you could only open up a door/spread your wings and fly away from here/write yourself into a fairytale/all your problems would just disappear") and sacrifice ("born an angel, heaven-sent/falls from grace are never elegant") both pretty explicitly, in opposite ways, equate wings with ozma's freedom. (hi @st-whalefall i see you.) and then there's the way ozma describes the branwens' bird forms: "Using this power, I was able to gift the Branwen twins the ability to "see" more, to move freely and be unburdened by their natural bodies. I... well... gave them the ability to turn into birds." <- freedom, unburdening, and clearer sight. IF ozma becoming a faunus through breaking his curse is in the cards, i would think this is pretty blunt foreshadowing.
and if it isn't—well, it's symbolic and might well remain symbolic but another thought i've been rolling around for a while is ozma finding some way of separating himself from oscar as a bird. they're fighting this curse together now; the curse is fighting back, and with the kids returned from the ever after, oscar and oz are going to be hearing about ascension and afteran magic and—maybe, depending on how detailed team rwby is in their account—about "you could just be human, or just a cat, if you wanted."
in one myth, faunus are created by the combination of sapient animals and human beings—through, it might be said, the merger of two souls into a singular new being. blake, in v1, is reading a novel about a man with two souls, fighting for control over his body. ozma loves stories, myths, fairytales—relies onstories to make sense of himself and his life. his curse is a false, corrupted form of ascension, and when blake looked at herself in the tree's mirror, it asked "are you complete? do you wish to return human-and-animal, separated?"
for blake, that was the tree's gentle way of confronting her with her past self-hatred, to help her see and crystallize how much she's grown from being that terrified girl who secretly wished she could just be human. but think about how oz and oscar might take that story.
oscar doesn't like using magic because it makes the merge faster. long ago, ozma carved out his divinely-given magic and created the maidens in hope of sparing his hosts, but the magic of his curse remains. he can't sever himself from his hosts, and fighting the curse outright causes it to lash out and hurt them both. but ozma also did *something* to grant the branwens shapeshifting; either he really did draw on his own curse to do that, or else he used the crown of choice to make it so. either way… the curse keeps trying to force him forward. force him to come out.
in the lost fable, the final outcome of his curse is at least represented by something like a haunting—ozma sees his other-self watching him from outside of himself. this may or may not be literal in the sense of what ozma experiences, but the idea of 'one soul in the body, one soul outside' is narratively in play. and ozma was able to seal himself off from oscar in a way that does seem to have altered the nature of their connection, or at least created room for oscar to reclaim his individuality.
so what happens if ozma gathers all the magic and throws his will behind the curse's attempts to shove him forward, instead of against, with the specific purpose of manifesting himself in some physical form outside of oscar's head, drawing on old myths about faunus being similarly two-in-one that blake's account of the ever after seems to corroborate as having a kernel of truth?
like—why not try something weird and out of the box? what have they got to lose? if it doesn't work then they're back to square one of grappling with the curse, and if it does then not only have they figured out a new way to give oscar some room to breathe but ozma emerging as a bird with a psychic connection to oscar would be real fucking helpful for the coalition as a spy/scout.