A special weapon, Star-Drainers are a powerful superweapon, capable of doing as the name says; draining the energy of stars.
The weapon was developed by the Kralgon back in the First Ottzello Galactic War, to steal the enemy's source of power and release it at them. However, the weapon was discontinued as it was unstable; several ships failed to operate when it was used. For a while they simply drained part of a star, however when used in UNO, the Ioketa being able to stabilize the ship and cool it, they made the weapon capable of draining entire stars.
The design of this superweapon is unknown from the inside. It is seen as just a spherical-shaped weapon at the top that drains in heat. The weapon hasn't been shown to even their allies, so nothing besides outside appearance is known. The weapons are also kept inside the hull until used.
Contained in multiple Kralgon ships, including both the Kralgon Obliterator and Kralgon Killship, and occasionally in UNO Warships. The weapon is used in aggressive situations to tear apart the enemy while stealing from them. It is the most commonly used superweapon, and is excellent in multiple situations. The onboard Ioketa is used to channel the energy through the ship.
Drains the energy of an entire star and channels it out through the ships' weapons. This energy can destroy entire fleets and planets. The energy is also used to replace the ships' Gyronic powering it. Often situations involve draining the star's energy, using it to race to the next star system and fire the energy on the star, making the star unstable and near-destruction, then racing back to a safe zone.
As for the fact that Stars normally take several weeks to drain, Ioketa on board use Dark Gyronic/Gyronic to speed up the rate of nuclear fusion in the star, which exhausts its supply of hydrogen more quickly, until the outward pressure caused by nuclear fusion is insufficient to oppose gravity, causing the star to contract or expand.
It's best to simply use tractor beams and gravitational pullers, this way the ship can't escape, and will end up being destroyed as it can't take the energy.
The Star-Drainer is used in multiple situations, usually to simply strike fear in the hearts of enemies. Since it can potentially destroy 2 systems with one use, it is used to quickly tear apart enemy locations. However it is also potentially dangerous to the ship and the crew even with Ioketa, so isn't used until the war reaches a high point.