Sneak Attack. Once per turn, Zahra can deal an extra 3d6 damage to one creature she hits with an attack if she have advantage on the attack roll. 
She doesn’t need advantage on the attack roll if another enemy of the target is within 5 feet of it, that enemy isn’t incapacitated, and she doesn’t have disadvantage on the attack roll.

Wails of the Grave. Immediately after Zahra deals her Sneak Attack damage to a creature on her turn, she can target a second creature that she can see within 30 feet of the first creature. Roll 1 Sneak Attack die and the second creature takes necrotic damage equal to the roll’s total, as wails of the dead sound around them for a moment.
Zahra can use this feature three times, and regains all expended uses when she finishes a long rest.

Spear. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit:  5 (1d6 + 5) Piercing damage. 

Cunning Action. Zahra can take a bonus action on each of her turns in combat. This action can be used only to take the Dash, Disengage, or Hide action.

Uncanny Dodge. When an attacker that Zahra can see hits her with an attack, she can use her reaction to halve the attack’s damage.