Damaged core: once the Clockwork soldier reached half of the maximum hp, it is vulnerable to all damage as the zycore center is weakened. Upon reaching 0hp or less, the clockwork soldier explodes in a 15 ft radius blast of arcane energy, forcing any in the radius to make a DC 15 dexterity save or take 6d8 force damage and are knocked prone. On a success, the creature takes half damage and is not knocked prone
  Augmentations: the clockwork soldier has the ability to be altered and changed to improve any aspect of the stats. In order to do this, a player must have proficiency in tinkers tools, and must spend downtime and equivalent resources according to the view of the DM.
  Crossbow Expert: Thanks to extensive practice with the crossbow and a calculative mind, The Clockwork Warrior gains the following benefits:

• The Clockwork Warrior ignores the loading quality of crossbows with which it is proficient.
• Being within 5 feet of a hostile creature doesn’t impose disadvantage on The Clockwork Warrior's ranged attack rolls.
• When The Clockwork Warrior uses the Attack action and attack with a one handed weapon, you can use a bonus action to attack with any crossbow it is holding.

• It has advantage on attack rolls against a creature it is grappling.
• It can use its action to try to pin a creature grappled by it. To do so, it makes another grapple check. If is succeeds, it and the creature are both restrained until the grapple ends.