Opening: Devil Fruit can be upgraded

Story of: Opening: Devil Fruit can be upgraded

Rebirth in Shimotsuki Village, obtain the devil fruit upgrade system

You start with a cold fruit, and your defective abilities all depend on upgrading.

Upgrade once, no longer afraid of sea water

Upgraded twice, frozen fruit is ready

Upgraded three times, the snow fruit is ready

Upgraded four times...Frozen fruit is ready

Upgraded five times... reached the limit, can't upgrade anymore

Then let's merge...