Her eyes open, new, inside the veil of light. Apart from them, she is like disembodied duty; her spectre already rides the first spark that re-bridges mind and body, whipping it onward with a determined command- keep the fire on. Dragging the regeneration onwards and out is like clenching not just every muscle but every cell of being, wringing the energy through her all at once and out of every last pore of her still-cooling body.
...
Lost in the haze of this smokeless pyre, the Doctor cannot make sense of anything else; The direction should be significant, but when she tries to find the world, it tilts and shifts before her- the dimensions are all scrambled, and all she sees are torn fragments of a transcendental storm. She snaps her eyes back shut.
None of it matters; There is nothing but blindly willing the ship up in the air a little bit longer, hoping wildly the last wave of evacuations is on its prompt way, that the time bought will be enough. The Doctor concentrates, in the chemical sense, almost, forces everything into one pure focus on this vague image of engines, which she has no bandwidth to imagine as anything other than great fiery shadows she is tying herself unto, feeding the heat of her potential to, desperately, to bring time, bring life…
=>
It cannot be helped; A deeper sensation trickles through and evolves in the back of her numb mind- her jaw is shut too tight, her throat burns. The need to breathe makes itself known. She struggles with control for a moment, releases her grasp just the merest inch to find she can maintain this, this state, and still breathe in, through her- through some other thing.
She is still all of devotion and concentration. But other levels of thought awaken; Now she notes her hearts are working- hurrah- and feels the warm-wind tang of ephemeral artron energy on her skin, which means she has skin. She ponders the pronoun situation and immediately dismisses it, waving away the thought of her friend's reaction- for later- but grips the conjured image of a friend close, a hazy recollection of warm presence. And all this while she burns.