Witch queen

How do you beat her? I have used attack spells and used light/heavy weapons and nothing seems to make a dent in her health.... How do you kill her??? Please help, I am stuckb here!!!!
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Harleydog wrote:I already received the witch hammer. However, when I kill the goblin leader, I'm taken to face the witch queen. Apparently the goblin leader was cursed by the witch queen as her "play toy". When I am teleported, my witch hammer is taken from me. So back to the same problem of how do I defeat her?