Azure Dragon Fruit

This glowing fruit is covered in tough durable scales, making it a meal for only the toughest warriors. 

The fruit will scale (separate from player level, depends on use and experience, up to level 5)

1st Level: Shift into a Chinese dragon form, grants flying speed equal to walking speed, and grants Gust, Firebolt and Frostbite as cantrips, add CHA mod. 

2nd Level: Dragon's breath spell, add charisma mod, Dragon form grows to Large, and you can constrict creatures up to your size. Your constriction works as a grapple, but at the start of each turn you deal 2d8+ strength bludgeoning damage. This is increases by 2d8 per size of your dragon form. 

3rd Level: Resistance to all non magical damage, and you can now control your flame clouds, allowing you to give items Large or smaller the levitation property, and this increases to huge and finally gargantuan as your devil fruit level increases. You can also drop these things on other creatures, doing Xd10 damage, depending on the size of the objects. 

4th Level: Dragon form at Huge +2 AC while in dragon form as your scales harden to shields, learns Firestorm, Whirlwind and Maelstrom x3 per long rest. You can now lift things up to huge with your flame clouds, doing Xd10 damage, depending on the size. 

5th Level: Shift into humanoid dragon form, a large form, +4 AC, and health buffed by Tough feat, melee attacks gain +5d6 damage to them, can cast Mordenkainen's sword, but it is reflavored as your big claw. You can also lift gargantuan objects, doing Xd12 damage depending on the object. And you can cast dragon' s breath at 5th level.