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Away from the world, Avalon is Artoria's most powerful defensive weapon after Wang Xiaoming's setting, but it is currently sealed (by Wang Xiaoming) and is just an ordinary scabbard. When Artoria's battle intent reaches a certain level, it will be automatically unblocked, and the defense ability is almost unsolvable (in fact, it can still be solved, depending on the strength of the power), but it can only be activated when the battle will reaches an extremely high level.

After the lockdown is lifted, the wielder Artoria's automatic healing ability is greatly enhanced, reaching the level that minor injuries are intact and serious injuries are healed slowly (excluding physical strength). In a way, it can indeed be defeated by one enemy.

Of course, these are all sudden and may change later.