At the immediate rear of of the ship the bone dragon was approaching, steadily closing the gap while soaring through the sky. There was only little time left before the preparation of 『Holy』 Magic was finished and I had to leave.
The gathering of mana had already started. Once it finishes I have to hurry and rush off this ship to cast the magic at the bone dragon.
Truthfully, the time window for deciding victory or defeat was small what made it kind of a gamble.