Kokamordos, the Terror of the Skies, is one of the bounty bosses found toward the end of Metaphor: ReFantazio. This is unlocked through The Cockatrice in the Clouds bounty, and these bounties are a great way to prepare for the endgame. Defeating this boss will get you closer to the level you need for the final boss and a host of rewards to make your party much stronger.
https://screenrant.com/metaphor-refantazio-how-to-beat-kokamordos-terror-of-the-skies/