Hanabi: Best build, Counters

Ninjutsu: Petal Barrage

Hanabi's Basic Attacks and skills launch Petal Blades upon hitting a target, dealing 30% damage and bouncing up to 4 times to nearby enemies. Petal Blades launched by Basic Attacks inherit Attack Effects.
If bounces from the same Basic Attack or skill hit the same target multiple times, subsequent bounces deal 30% less damage.

Ninjutsu: Equinox

CD: 15 Mana Cost: 75

Passive: Whenever Hanabi has a shield from any source, she is immune to control effects.
Active: Hanabi gains a 300 (+40% Total Physical Attack) shield for 5s. When the shield is active, she gains 20% Movement Speed and 25% Attack Speed, and 20% of her damage dealt to enemy heroes is added to this shield (only 10% of the damage dealt to non-hero units is added). This shield cannot exceed 50% of her HP.

Ninjutsu: Soul Scroll

CD: 8 Mana Cost: 50

Hanabi fires the energy Kunai in the targeted direction, dealing 350 (+80% Total Physical Attack) Physical Damage to enemies along the way and reducing their Movement Speed by 60% for 1s. Enemy units hit will also be marked, allowing Hanabi's next Bounce Damage from Basic Attacks to deal 30 (+100% Total Physical Attack) Physical Damage on them with no damage decay.

Forbidden Jutsu: Higanbana

CD: 40 Mana Cost: 120

Hanabi throws Higanbana in the targeted direction, dealing 300 (+50% Total Physical Attack) Physical Damage to the first enemy hero hit and immobilizing them for 0.8s. After 1s, Higanbana will bloom at the location of the first hit, dealing 300 (+50% Total Physical Attack) Physical Damage to nearby enemies. Subsequent hits on the same target decay to 30% damage.