Fyrus

Fyrus with Ordon Sword

1. At the start of the fight, quickly snipe the crystal on Fyrus's forehead.

2. Grab the right leg's chain (it will probably be sitting by Fyrus's left foot) and try to walk directly away from Fyrus with the iron boots on (pull the chain all the way out before putting iron boots on).

3. Jumpspin the crystal on Fyrus's forehead.

4. Snipe the crystal on Fyrus's forehead and repeat steps 2 and 3.

5. Repeat step 4, but this time, do an ending blow from directly behind Fyrus.

Fyrus with Master Sword

1. At the start of the fight, quickly snipe the crystal on Fyrus's forehead.

2. Grab the right leg's chain (it will probably be sitting by Fyrus's left foot) and try to walk directly away from Fyrus with the iron boots on (pull the chain all the way out before putting iron boots on).

3. Rollstab the crystal on Fyrus's forehead.

4. Snipe the crystal on Fyrus's forehead and repeat steps 2 and 3.

5. Repeat step 4, and finish Fyrus off with another rollstab.

Fyrus Without Iron Boots

It is possible to defeat Fyrus in twelve cycles without using the iron boots. From the tenth cycle onwards, every time you snipe the crystal on Fyrus's forehead, he just falls down.

Notes

The pots around the boss room alternate between heart drops and arrow drops. If you wish, you can collect arrows after the second round to have the maximum number of arrows leaving the fight (29 Arrows). You could refill hearts after the first round if you are not planning on getting the heart container.

Pulling on the chain connected to Fyrus's right leg is slightly faster.

You don't actually have to hit Fyrus after each of the first two knockdowns. The ending blow prompt will show up on the third cycle regardless of whether or not you did damage on the previous two cycles.