Verified for patch 16.8.1

Battle Bunny Crossbow

Gain Precision.

Every 4 critical strikes, fire 5 piercing arrows that can critically strike towards the target. Each deals 80% physical damage.

Precision
Max 3 stacks per Ability cast.
Recommended Roles: Attack Marksman or Fighter

Source

Anima

Effects

AD: 0.2
AS: 25
ArrowDamagePercent: 0.8
CritChance: 35
MaxPerSpell: 3
NumArrows: 5
NumCritsNeeded: 4

Battle Bunny Crossbow enables

On Cast On the Menu

Effect fires the moment a unit casts its ability. Spellslinger / Jeweled-Gauntlet payoffs key off this.