Bramble: The Mountain King

You will fight Karrhaxan near the end of the swamp area. You will be on a small boat and Karrhaxan will attack you from underwater. You can see the small waves and bubbles indicating the direction of the boss. Turn around with the camera and wait until you see them. Once the boss gets outside the water, shoot her with +.
Again, the fight has three rounds:

1. Karrkhaxan will spawn an infant carriage and after that, will show herself. Be sure to follow the small waves
2. Same as before but this time, she will spawn 2 infant carriage
3. Just like the first time, she will spawn only one infant carriage