Immutable Balls allow you to Evolve and Accessory into a higher rarity without changing the Accessory type. Follow the steps below to use an Immutable Ball:

1. Select a max level base Accessory from the Accessories screen.
2. Tap the "Evolve" button.

※ After pressing the “Evolve” button, the following screen will be displayed.

3. Select another max level Accessory of the same rarity from the Accessories list.

4. Tap the "Immutable Balls" button and then tap an Immutable Ball of the correct rarity to add it to the "Items to Fuse" list.　

5. Tap the "Evolve" button

Immutable Balls can only be used for ★1, ★2, and ★3 Accessories. For a list of Accessories by rarity, tap the "Strategy" button at the bottom of the News screen.

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