Shargaas's Sight:
Magical darkness doesn't impede the Orc's darkvision
Slayer:
In the first round of a combat, the Orc has advantage on attack rolls against any creature that hasn't taken a turn yet. If the Orc hits a creature that round who was surprised, the hit is automatically a critical hit.
Cunning Action:
On each of its turns, the orc can use a bonus action to take the Dash, Disengage or Hide Action.
Hand of Shargaas:
The Orc deals an 2 extra dice of damage when it hits a target with a weapon attack (included in the attacks)
Multiattack:
The Orc makes two scimitar or dart attacks.
Scimitar.
Melee weapon attack: +5 to hit, reach 5 (3d6+3)
Dart:
Ranged weapon : +5 - 20/60 - (3d4+3)
Veil of Shargaaas (recharges after a short or long rest)
The Orc casts Darkness without any components. Wisdom is spell casting ability.