[llamabeast]

Indeed, it just stays in the same form.

One issue is that at the end of a battle the creature ages by a month as well. With the wendigo I just said it gorges on the corpses at the end of a battle and grows more quickly. But with other creatures (like a dragon's egg) that would make less sense. I think I worked out an ingenious way round this issue at one point. In fact I know I did, though I never tested it. If you'd definitely make use of it though, I could try to rustle up a prototype.