Venom

Appearance
Venom has form of short-sword while nonactive state, having green oval emerald imbued to it's handle. When activated, blades segments separate, revealing metal wire between them.

Abilities and Powers
While already strong as weapon, Venom has eaten Hebi Hebi no Mi, Model: Spiny Viper, allowing it to turn to snake and back. While in snake sword has razor-sharp metal scales, able to rend wood and flesh to shreds easily. It also has really potential venom, killing victim after 3 days from bite.