Abh mod/Guardian Sphere
The Guardian Sphere was introduced in 0.5.3 RC5. It's released was moved back from 0.4.5 because many players considered guardians too powerful. It was later released in conjunction with an expansion of higher tier parts.
The guardian sphere is an automated ancient drone. It can be operated as a ship. The drone is armed with multiple types of weaponry. It has a shield type defense and has missile defense. It is weak against explosion and shield penetrating weapons.
It can be used as an independent ship alone. When attached to a mothership it has to be set free in order to use it as a drone. In order to set it free connect it with structures and one Explosive Bolt in-between to the mothership. As of Cosmoteer 0.13.6 the Explosive Charge can be used instead. Activate the explosive bolt or detonate the explosive charge to set if free.