Item description:

Press [] to use Doomblade with Kelpie

Let the LEFT meter fill up to anywhere between 2-4 hits

Then press X when the bar is in the red portion of the other meter

If you're on 4-hit, you can't wait too long or you'll take damage

Repeat until boss is defeated


Reidso's Note:

I waited until it touched 4-hit

It should take 3 attacks to defeat the boss