✔ Charm Slot Upgrade is a feature where you can increase your equipped Charm’s effects by applying different Upgrade effects to individual Charm slots.
✔ Go to the Star Fuser in each Act’s Town or in Saluto to use the Charm Slot Upgrade feature.
* The Charm Slot Upgrade feature can only be used after the Act 13 main story has been completed.

✔ Select Upgrade Options from the Charm Slot Upgrade List to unlock/level them up.

✔ [Charms] and [Gold] are used as materials when leveling up Charm Slot Upgrade Options.

- When leveling up after a certain level, you will need [Star Fuser Upgrade Stones] as well as [Charms].

- The required Charm tiers and options used as materials will differ according to the Upgrade type and level.
✔ [Chaos Stars], [Charms], and [Gold] will be used as materials when leveling up Chaos Star Upgrade Options.

- The required Chaos Star tiers and options used as materials will differ according to the Upgrade type and level.
- When leveling up after a certain level, you will also need [Star Fuser High Upgrade Stones].

✔ After selecting Upgrade Options from the Upgrade List, you can apply the Upgrade to a Charm Slot.

- There are activation conditions for Upgrade Options, and slots equipped with Charms that have met the required conditions will shine brightly.

✔ Upgrade Options that have been upgraded to the max level can be applied to all Charm Slots.