Aka

Cunning action. Aka's quick thinking and agility allows him to move and act quickly. he can take a Bonus Action on each of his turns in Combat. This action can be used only to take the Dash, Disengage, or Hide action.

Sneak Attack.  Aka knows how to strike subtly and exploit a foe's distraction. Once per turn, he can deal an extra 1d6 damage to one creature he hit with an Attack if he has advantage on the Attack roll. The Attack must use a Finesse or a ranged weapon.

he 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 he doesn't have disadvantage on the Attack roll.

The amount of the extra damage is 6d6.

Evasion: Aka can nimbly dodge out of the way of certain area Effects, such as a red dragon's fiery breath or an Ice Storm spell. When he's subjected to an effect that allows him to make a Dexterity saving throw to take only half damage, he instead takes no damage if he succeeds on the saving throw, and only half damage if he fails.

Assassinate. During its first turn, Aka has advantage on Attack rolls against any creature that hasn't taken a turn. Any hit he scores against a surprised creature is a critical hit.

Multiattack. Aka makes 2 melee attacks.

Shortsword +1. Melee Weapon Attack: +8 to hit, reach 5 ft., 1 target. Hit: 7 (1d6 + 4) Piercing damage.

Dagger. Melee weapon attack: +8 to hit, reach 5 ft., 1 target. Hit: 6 (1d4 +4) Piercing damage.

Uncanny Dodge. When an attacker Aka can see hits him with an Attack, he can use his Reaction to halve the attack's damage against him.

Enter the description for how legendary actions work for your monster here.

Legendary Action Name (Costs # Actions). Enter the description for your legendary action.