1. Before you attempt to enter the castle, make sure you buy a powder keg. Put on the Gibdo’s Mask and enter the castle.
2. With the Gibdo's Mask on, you'll make the Re Deads dance and stuff rather than paralyzing you. Use fire arrows and shoot the frozen switches on the pillars to open the doors, then enter the door on the left.
3. Hit the switch and run quickly under the large ceiling that rises. Once you reach the deku flower nex to the pillir with a switch on it ( the kind you step on), transform into the Deku Scrub and dive into the flower. If the ceiling falls, don’t worry because it will rise again when you shoot out of the flower thing. Use it to reach the button on top. Press it as Link, then continue to the next room.
4. Turn into the Deku Scrub and fly to the switch on the left. Use Link to press the switch.
5. Now, between you and the skulltula is an invisible platform (use the Lens of Truth). While standing on the platform, kill the skulltula. Jump to the ice platform, then jump to the first one.
6. Transform into a Deku Scrub and fly to the platform on the right. Aim for the left side of the platform since a skulltula is above the right side. Kill it, then use the hookshot on the hanging mines if you want. Start them swinging, then once they hit each other, they'll explode. Use the flower to reach the now unlocked door.
7. When you enter, there will be blue bubbles so use your shield. Walk up the stairs, then climb up onto the outer wall.
8. You will see a Piece of Heart, but ignore it for now. Walk along the wall until you reach the area above the main entrance. Shoot the two Guay, then use the deku flower to reach the switch.
9. Hop over to the other flower and use it to return to the wall. NOW you can try to get the piece of heart (it's no big deal if you fall down). To get it, shoot down the Guay, then hit the switch with the hookshot. Jump to the first flower, transform, then use it to reach the next flower. Use that one to reach the Piece of Heart.
10. Now jump down to the ground and enter the castle.
11. Enter the right door use the Gibdo mask on the ReDeads (for shits and giggles, go in between the four ReDeads and keep using the spin attack while NOT wearing any masks).
12. Use the mirror shield to kill the Floormaster and the three mini versions.
13. Aim the reflection on the sun block (keep the Gibdo Mask on. It helps.) Enter the door past the ReDeads and take the stairs past the other ReDeads.
14. Transform into Darmani and use the Powder Keg on the weak floor, crater, shit hole thing.
15. Jump down and use the mirror shield on the sun block. Remember to still use the Gibdo's Mask.
16. Enter the hall and continue to the Throne Room. Igos du Ikana, the king, will close the drapes to darken the room. Ignore the two huge ugly skeletons he uses to try to kill you and fire two Fire Arrows at the two drapes. NOW start attacking the skeletons. Once one of them collapses, run into the light and use the mirror shield to shine it on him to defeat him permanently. You can also use the shield to annoy them and make them run away into the darkness.
17. Once the two little skeletons are taken care of, the king, Igos du Ikana, will attack you. Use the same strategy, but this guy will remove his head a few times and let it fly around a little while just to piss you off. Just hit him and shine the light on him when he collapses. For shits and giggles, wear the Captain's Hat before the battle, the king will think you're a mini-version of the captain.
18. Once the three spirits are freed, learn the Elegy of Emptiness from the head of the king, Go into town, deposit rupees, save, and take a break from playing unless you have no life and want to continue playing.