The attack capabilities of the light cruiser-level and destroyer-level Oracles were not high, and to add insult to injury, they had already been weakened by their rough landing on the Main Plane. Even with the usage of the most powerful weapon onboard, the "torpedo," and even if they managed to launch a fully accurate frontal strike, it would only be enough to send the high-level adventurers retreating by a few steps. However, if one attack was not enough, what about ten? What about a hundred?
The gradual accumulation of damage would eventually lead to visible change.
