Blurred Movement. Attack rolls against the acrobat have disadvantage unless the acrobat is incapacitated or restrained.

Evasion. If the acrobat is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, it instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.

Sneak Attack.
Once per turn, you can deal an extra 5d6 damage to one creature you hit with an attack with a finesse or ranged weapon if you have advantage on the attack roll. You don’t need advantage on the attack roll if another enemy of the target is within 5 ft. of it, that enemy isn’t incapacitated, and you don’t have disadvantage on the attack roll.

Spellcasting. The Acrobat is an arcane trickster. Its spellcasting ability is Charisma (spell save DC 15, +10 to hit with spell attacks). invisibility at will and has the following spells prepared:

Cantrips (at will): frostbite, lightning lure, minor illusion, shocking grasp

1st level (4 slots): charm person, color spray, jump

2nd level (3 slots): arcanist's magic aura, blindness/deafness

Multiattack. The acrobat makes four attacks two with its daggers, and two with shadow daggers.

Dagger. Melee or Ranged Weapon Attack: +10 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 8 (1d4 + 6) piercing damage.

Shadow Dagger. Melee or Ranged Weapon Attack: +10 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 8 (2d8) necrotic damage.