Any critical hit against you becomes a normal hit.
When you are reduced to 0 hit points, you can take a reaction to cause your body to transform into a destroyed Automatus Carcass and your conscious into an Auxiliary Vital Drive.
While unarmored (except shields), your AC is 13 + your Strength, Dexterity, or Constitution modifier, whichever is higher.
You ignore the heavy property of medium and heavy armors. Moreover, you have advantage on Dexterity (Stealth) checks, provided you have light armor or no armor equipped.
You can take the Magic action to transform into an humanoid creature with an equivalent appearance, or back to your normal form. While transformed through this feature, creatures detect, perceive, or sense you as a humanoid creature.
You can take the Magic (Attune) action for 1 hour with an armor that you are trained with and have equipped, regardless if the armor requires attunement or not. While attuned to and equipped with the armor through this feature, the armor can't be removed against your will and you gain a +1 bonus to your Armor Class.
You have darkvision.
Any effect that would cause a humanoid creature to regain hit points or remove a condition can also affect you.