Battle of the Long Night (7)

Shield City / East District 

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Kane ran back to the Stairs of Serenity with a Gold Hunter Party from the Shield Family with him.

Previously, Kane had no trouble asking for that help. The Major seemed to have thought about the possibility that Cathedral would be attacked and immediately sent the party he had prepared to leave.

However, when they arrived in front of the gate to the Stairs of Serenity, a large natural phenomenon occurred.

A great whirlwind swept through the Stairs of Serenity. 

That doesn't look like a natural phenomenon, because the whirlwind aims to get rid of the AOE debuff from Deadly Vulture.

The great whirlwind gathered all the poison winds coming from the AOE debuff. After all the poison winds had been absorbed, the great whirlwind started flying upwards. When its reach the very top of altitude, the great whirlwind began to dissipate and spread in the sky.