Genius ninja in the Shadow Sect who is at the crossroads.

Ame no HabakiriDamage dealt by Hanzo's Basic Attacks and skills inflicts a stack of Dark Ninjutsu on the target, up to 5 stacks. Ninjutsu: Demon Feast can only be cast on targets with full stacks of Dark Ninjutsu.
Hanzo's Ultimate enables him to poke or dive with relative safety, making him a serious threat to squishy heroes without mobility, like Layla, Ixia, and Zhuxin, while also disrupting the enemy in teamfights.
Hanzo fares less favorably against heroes with lots of mobility, such as Fanny, Lancelot, and Arlott, since it's difficult to build stacks on them, thus limiting Hanzo's damage.