They've left him alone in his cell.
He can't really be said to be lucid but he has very acute instincts for when there's someone and when he's alone - it's the last of his senses to depart him - and he's alone.
And then suddenly he isn't.
One of the birdfolk glides to the front of the crowd to get the spell form - it's much slower, transferring it without osanwë - and then flies back up to one of the pillars to examine it. The rest of the flock goes back to asking questions - what other kinds of magic do they have? what do they use it for? Would they be willing to make some of the birdfolk spellbearers, with the teleportation?
As they're asking, piece of paper appears in midair between the Quendi and the birdfolk, startling a few of them into flight. It's a note, obviously from Rána - nobody else's handwriting is that messy, no matter how much of a rush they're in - and it says 'the healing form is more dangerous than the teleportation'.
Understandably! But they don't do it. (There's some debate in the back, quiet compared to their usual ruckus, about what they should do if someone starts doing that kind of thing here.)
The mage, who'd returned to the ground while they were discussing that, approaches again. "We'd be very interested in trading our magic detection for the healing form. And I promise it won't be used for that sort of... atrocity." It's hard to read the expression on her beaked face, but her crest is pulled in tight to her head, in comparison to the raised crests they've mostly seen from excited birdfolk.