Melusine - The Witcher 3

The witcher killed Melusine and along with her the sirens that made up her ghastly entourage. The inhabitants of Svorlag needed fear her no longer - and could now gather the remains of their loved ones from her cave.

I… I saw a shadow… Great wings, like a cloud passin' o'er the sky. Then I heard him scream.
– Britt of Svorlag

In the mountains near the village of Svorlag in Skellige lies an enormous complex of caves. For many centuries they were given wide berth on account of the bloodthirsty ekhidna known as Melusine who had made them into her lair.

Melusine was a beast so powerful some islanders worshiped her as a semi-divine being. The witcher, however, harbored no such delusions. He knew she was an extremely powerful monster - but a monster all the same. This meant she could be killed. To do so, he would need the highest quality of bolts, a solid silver blade - and a steady hand.