Evasion. If the nimblewright 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 save and only half damage if it fails, provided it doesn't have the Incapacitated condition.
Multiattack. The nimblewright makes three attacks, using Scimitar or Clockwork Crossbow in any combination.
Scimitar. Melee Attack Roll: +6, reach 5 ft. Hit:7 (1d6 + 4) Slashing damage.
Clockwork Crossbow. Ranged Attack Roll: +6, range 80/320 ft. Hit:8 (1d8 + 4) Piercing damage.
Parry. Trigger: The nimblewright is hit by a melee attack roll while holding a weapon. Response: The nimblewright adds 2 to its AC against that attack, potentially causing it to miss.
Cunningly Crafted Clockwork Sentinels