Aokiji wielding the ice saber

 

Name: Ice Saber
Origin: One Piece
Type: Sword/Saber
Powers and Abilities: Is much harder than regular ice as it is forged by the power of Aokiji's Devil Fruit (was able to collide with Zoro's sword and was kicked by Sanji without sustaining any damage)
Destructive Capacity: Multi-continent level+ via powerscaling
Wielder(s): Aokiji
Material or Element: Ice (effectively harder than steel)
Needed Prerequisite for Use: Nothing notable
Notable Attacks/Techniques or Alternate Forms:

N/A

Other: Ice Saber is not a formal weapon in the sense that it is a single constant weapon, it is merely a random bit of ice that Aokiji turned into a sword.