Hello!

As you might have seen on forums a need mount is coming... In order to tame it you'll need a Melting Horn, which is believed to get by using Tinder on a Fireproof Horn. The fireproof horn is confirmed to be dropped by Chakoyas, the tinder however is still unknown, the IDs for the new items are:

Melting Horn : 20355
Fireproof Horn : 20356
Tinder : 20357

If you find anything please feel free to share!

Good luck!
~MrElle