In Oceanhorn, during the boss sequence with Mesmeroth, I'm able to get him down to his last tiny bit of health, but cannot finish him.
I use the shield to reflect his fireballs back at him until he turns into the glowing balls, and hit the balls to reduce his health.
I hit the generators to stop the lasers from shooting.
Repeat 1-2 until he has a tiny bit of health left, and then he stops turning on the generators.
He starts shooting multiple fireballs at once, and I repeatedly reflected his fireballs back at him, but he never loses health or turns into a fireball.
Twice I've done this, and reflected fireballs for 15 minutes with no progress. I tried bombs, fire spell, ice spell - nothing works. Any advice?