Black Smoke

is the Ignition Ability of Yūichirō Kurono.

Overview
By utilising his over excessively Tephrosis-infected arm, Kurono can emit black smoke in a variety of ways offensively; ranging from using it to hide himself to attack his opponents without being seen, and solidifying the smoke into objects such as knives and kunai. The smoke that he emits is also connected to his senses, allowing him to track movements that happen within the smoke.