When the green wings vanished beyond the storm's veil, Drake knew he was truly alone. The enemy was down below, waiting for him. Despite his bad shape, the Fire Dragon had an advantage. Being able to fly kept him safe and away from Zeir's grasp.
The War Wolf Dragon stood in the middle of Terix's poison pool, which ate his chaotic energy. Meaning he had fewer energy spheres or of lower intensity. It was possible that Zeir might have already depleted his reserves with the one he sent after Hope.
Drake would have been more worried about Hope, but her fears were minimal. Sure, the sheer presence of a smidgeon of dread emanating from her was enough for concern. But she was safe, and she had enough strength. Worrying for her would have resulted in her becoming offended.