It's too difficult to fight. I'm only level 28 and my tentacles keep resurrecting.
New hope after the storm
Manually hit the back hand
sunshine in rain
Just kill it and inject damage. If you can't beat it, just practice character training.
The sun shines brightly after the rain
Raise output and milk to level 50
Deep in the soul
I just hit the back hand after finishing it, and then hit the front hand. When the back hand is revived, I hit the back again. This way I slowly wear it to death.