There will be a glowing spot around his neck area, under its head. On attacking that spot you will deal more damage. When the HP of Nidhogg falls below 50% it will soar above the ground this will start the second phase of the fight. In the second phase, the attack pattern of the boss will change. You have to be wary of red spots on the ground Vay Tiền Nhanh Chỉ Cần Cmnd.

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