Interesting idea, this alternate group of magical beasts bitter at the popularity of dragons. Reminds me of the petty bickering of Greek and Roman gods in their myths.
You’ve got some typos, and the second sentence is a fragment which could easily be tagged onto the first sentence with a comma. Overall a neat idea that just needs a little bit of grammatical cleaning up.

Oh, and I think you mean “than” rather than “then”.

Aye, than is comparitive, whereas then is a phrase of time.