"Oh, yes, probably," he says. "I can also do something about - I don't have the vocabulary, excuse me - she's locked out of the only one of her available alternate shapes that she's taken? Because it died?"
"Yes. Or free it up entirely, I don't know which she'd like better. I also don't know how much magic either one will take, but the bulk of the enormous magical crisis is past as far as I can tell and I can probably afford to experiment. Unless there is another group of dragons who is about to drop dead at any moment from easily fixable magical causes, which, now that I'm not distracted by a great big pile of horrifying, I'm beginning to suspect might be the case..."
"Are you talking about old age?" says Piro, slightly disbelievingly.
"Yes. At least, I'm pretty sure I am."
"I can fix quite a lot of things," says Lazarus. "I can see magic and have access to a nearly unlimited supply of nearly arbitrary miracles. The only thing is that it's not immediately apparent why old age kills you. There is a difference in - in precariousness, between younger dragons and older ones, but I'm not sure where it's coming from. And it looks like if I fixed it too naively you would all just continue growing a foot a decade forever, which has got to get unmanageable at some point..."
"I suppose I could just make all adult dragons variable length - pick any size between twenty feet and your personal maximum via normal growth rate, anytime you like," he muses. "And probably institute some sort of reasonable maximum so that a few million years from now some dragon or other does not decide to swallow this planet just to be obnoxious... I'm just throwing ideas around here, but I don't see any reason why that wouldn't work."