Alyst

Keen Sight. Alyst has advantage on Wisdom (Perception) checks that rely on sight.

Lifelike: While the creature is viewed from a distance and isn't performing obviously abnormal activities, it resembles an ordinary creature. A creature within 30 feet of it can discern its true nature with a successful DC 15 Intelligence (Nature) check.

Antimagic Susceptibility: The clockwork construct is incapacitated while in the area of an antimagic field. If targeted by dispel magic, the clockwork creature must succeed on a Constitution saving throw against the caster's spell save DC or fall unconscious for 1 minute.

Arcane Artifice Nature: It does not require air, food, drink or sleep but it must spend an hour in a dormant state in order for its mana crystal to recharge.

Claws. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 1 slashing damage.