Ice-Ice Fruit

The Ice-Ice Fruit is a Logia type fruit that allows a user to transform into, create, control, and manipulate ice. It was eaten by Zeles Valhalla.

Abilities
As Amelia mentioned to Yumi, the Ice-Ice Fruit is incredibly powerful, being able to naturally counter her Flame-Flame Fruit.

The Ice-Ice Fruit allows Zeles to not only turn herself into ice, but she can create ice out of thin air. She also possesses the ability to freeze others solid. If they stay frozen for too long, the tissue and organs will also get frozen, causing permanent damage, or death.

Being a Logia Fruit, Zeles is almost completely immune to any attacks that aren't imbued with Haki.

The main weakness to the Ice-Ice Fruit is overbearing heat. When Amelia awakened her Flame-Flame Fruit, the heat made it more difficult for Zeles to use her abilities as efficiently. If Zeles gets shattered in her Ice form, it also takes time for her to reform, unlike Amelia who can switch back and forth rapidly and move at high speeds.

Rating
Scholasticus ranks this fruit in the "S" Class:

"The Ice-Ice Fruit is incredibly versatile. Not only is it in the elite class of Logia's but it is arguably one of the strongest of that class as well. Being able to freeze enemies, the Ice-Ice Fruit possesses the ability to instantly win the fight if the opponent cannot break out. Only being weak to heat, there are few Devil Fruits that are comparable strength wise to the Ice-Ice Fruit."