Slumbering breath: as a bonus action Zero can remove their mask and exhale a sleep gas causing every creature within 30ft of them to make a dc17 wisdom saving throw or fall unconisoss 

Bane of Wrymlings: by killing many baby dragons for sport zero has become quite good at it and deals double damage to all wyrmling dragons

Black Mask Mark: They bare the mark of a black grinning theater mask on their wrist and wild beasts and monsters including goblins and lizardfolk attack them on sight 

Super strength Unarmed strike: melee weapon Attack:Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (2d8) bludgeoning damage.

Optional Armblade:Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (2d6) slashing damage.

Stunning screech: all cretures (that can hear) within a 30ft cone must make a dc 17 con save or take 2d6+7 thunder damage and be stunned until the end of their next turn if they succeed the save they take half damage and are not stunned

Bare handed parry: zero is not good enough with a sword to parry but they just just grab your weapon so as a reaction if an enemy within 5ft makes a melee attack against them they can add +2 to their ac