Once again, Bowser sees it within power to interfere with your travels, using a giant dragon to down the Odyssey, prompting your arrival to the Ruined Kingdom. When you regain control, head up the short set of stairs and look for an opening on the one side, where you will find a ledge you can grab onto, letting you shimmy around the wall. There will be a lot of gold coins here, as well as a chest, which contains a Power Moon (In the Ancient Treasure Chest) . Return to the stairs and head all the way up, then use your hat to rip out the metal object, revealing a spark pylon, which will bring you to a big area where you’ll confront a boss.
BOSS - Lord of Lightning
The Lord of Lightning is definitely a new type of foe for Mario, and is certainly a big fellow. When the battle begins, you should see a faint purple glow on the ground, which is where the boss will shoot lightning at. Upon hitting the ground, the lightning will split into discs that will shoot out into three directions. They are pretty easy to dodge and he will do this attack twice. After he does the second attack, the Lord of Lightning will slam his head onto the ground, making electricity shoot out in an irregular pattern. Avoid this and you can jump onto his head, where you will want to rip out the metal objects (three in total for the first phase) removing his “crown” and allowing you to ground pound his head to damage him.
If you need health at all during the battle, look for the slightly raised spots on the floor with light emanating from them and ground pounding them will give you a heart. Once you damage him, the fight will move onto the second phase, which is the same as the first. The only differences are that more discs will come out from his lightning attacks, the lightning when his head hits the ground will be more intense and you have to pull out more metal objects (four in the second phase). For the third phase, the Lord of Lightning will do his initial lightning attack quickly in succession, leaving you with less opportunities to dodge the discs. The head slam lightning is a little more intense and you will have to pull out six metal objects. Perform a third ground pound to finish the fight and receive a Multi Moon (Battle with the Lord of Lightning) .
You may think you’re finished with the Ruined Kingdom, from the very short moon list, but there is one more thing you can do here. Return to the boss arena, ignoring the Lord of Lightning taking a nap, and use the rocket to launch yourself to a new area. It consists of multiple 8-bit murals, where you need to press P-Switches outside of them to stop platforms at specific spots. If you don’t feel the platform is in the right spot, then you can use the large round button to get them moving once more so you can try again.
Stop the first one so you can reach the next ledge, then run across the bricks to get to the next set of switches. You can stop these when they are in a backwards L-shape, with the thicker part being vertical; some coins will spawn if you stop them at this spot. The pipe beyond that will lead to another 8-bit section, with a bunch of Koopa Troopas, but if you head left, you find a hidden area with a moon. However, some bricks are stopping you from reach it, which is where those Koopa Troopas in the adjacent area come into play.
Jump onto the red Koopa on top and hit it to your left, then chase after it to watch it destroy all of the bricks. Once the path is clear, use the pipe to reach the P-Switches for the platforms, where you’ll want to stop them at the bottom, allowing you to grab the Power Moon (Roulette Tower: Stopped) . Return to the area with the Koopas and continue to the right this time, where you will eventually reach the last area with switches and moving platforms. The good setup here will be bottom, middle and top, going from left to right, letting you get to the top, where the Power Moon will be waiting for you (Roulette Tower: Climbed) . Alright, warp back to the Odyssey, repair it with the moons you’ve gathered and you’ll automatically set sail for Bowser’s Kingdom.