On this page of the Tunic guide, you will learn the Magic Ball's location and how to find it. It is a magic item in the game that will allow you to pull enemies to your character and get to certain places.
To find the Magic Ball, you have to get the sword, shield, lantern, and wand first. The way to get them all is described on the pages: Sword - how to find?, Shield - how to find?, Lantern - how to find? and Wand - how to find?.
In order to get the Magic Ball, you have to go to The Ruined Atoll, located south of Overworld, right behind the destroyed bridge. To get to the other side of the bridge, you have to go down to the beach below it, bypass Autobolt and climb the ladder hidden next to it.
Once you enter the location, your main destination is the Frog's Domain northeast. The easiest way to get there is to go north of the fox statue in the center of the atoll. You will find it easily - just go straight through the beach from the shrine (checkpoint) located at the very beginning of this zone.
Go over the water using the protruding part of the statue and then turn right. Walk under the marble bridge supported by columns, where you can see a treasure chest. Next to it, there is a passage in a narrow canyon between two rocky hills. The camera in the game will change the perspective, and you will suddenly notice a ladder. Climb on it and you will end up in the Frog's Domain.
Use another ladder, this time the one that will lead you down the hole. Now go down to the bottom of the cave (it will take a while) until you find a room with three bathing frogs and a checkpoint. Go to the right of the shrine (eliminate enemies on the way), then go left into a narrow corridor until you get to a slightly larger room with a gate in the center. The lever to the gate is on the left - guarded by a group of octopuses.
After going through the gate, you will reach an open golden gate. Instead of using them, turn right and use the hidden passage. On the other, you will find a swamp full of Slorms. Be careful, it's easy to die here.
Go forward, climb up the ladders and stick to the upper ledge. You will then reach a sacrificial altar with a Magic ball. However, before you take it, you have to face a group of frogs and mages, which will require a lot of focus.