Spinel’s Injector was a massive construct designed to inject a toxic biological substance into the earth which destroys all life it comes in contact with. Spinel brought the injector to Earth to take revenge against Steven Universe and the other Crystal Gems after she was abandoned by Pink Diamond.
It had a black-accented hourglass-shaped body with a pop-out drill and three foldout spider-like legs at its base. There was a large hot-pink gemstone-like object with a heart-shaped facet which resembled Spinel's gemstone at the top.
Instead of draining life from a surrounding area to create new Gems this Injector delivers a type of poison called "Bio-Poison" which kills all organic life including (but not limited to) plants, animals, insects and people. All organic life will be destroyed for 41 hours (1 day, and 17 hours). The poison appears to paralyze any organic matter when the poison comes into contact with it as seen when Greg Universe came into contact with the poison, and got his left arm completely paralyzed. If the machine is disturbed or tampered with its injection rate accelerates. Additionally, excessive damage to the Injector can cause it to explode which was its ultimate fate after Spinel's fight with Steven crushed the top of it.
This Injector can be freely and easily controlled by Spinel herself through a horn created from her elasticity. It can be activated, deactivated and even sped up through her horn, the final command of which pumps the poison at such a rate that it overflows from the injection site.
- It was confirmed during a book signing that this injector, along with the Gem Rejuvenator , belonged to Pink Diamond prior to her demise.
- It is not known when, why, or how either of the first two weapons were developed, but Spinel apparently had access to them both hence being Pink's best friend. It is never made clear exactly why Pink decided to show her these weapons to begin with.
- The Injector with bio-poison is a planet killer. It shares similarities with other planet killers in Star Trek, as well as superweapons from Star Wars including : the ancient Sith superweapon on top of Sith Temple in Malachor, two Death Stars and Starkiller Base, and Lord Dominator's ship in the second season of Wander Over Yonder.