The Golden Lute is a tough boss if you don't know what you are doing, but has a small trick to it that makes the fight much easier.
The two directional traps on the ground allow you to hit the Golden Lute in rapid succesion, and doing so allows you to do 3 hearts of damage instead of one everytime, and having to go through all the 3 stages of the fight.
I also made a small mistake where I tried to hit the Lute while it was confused, but couldn't, so it summoned the dragons, but hit it right afterwards to also trigger the lasers on the left and right, which was completely coincidentel, but it worked out for me anyways. I ALSO only bombed myself to show I could do it with only a dagger and shovel, and no potion.
I do not own the music to this game, nor did I create it. All credit goes to the orginial creators of the song, so please support the creators, and listen or buy the game. (Or whatever)