Kul Teska was a Skakoan male mercenary active during the Clone Wars between the Galactic Republic and the Confederacy of Independent Systems. Before he took a criminal's path, Teska was a respected scientist in the Techno Union. However, an accident with his pressure suit left Teska disfigured and forced him to leave the Union. With the help of his knowledge in the field of cybernetics, Teska rebuilt his pressure suit, equipping it with a variety of weapons, and became a gun-for-hire. All the while, Teska continued his own experiments with gravity and began construction of the gravitic polarization beam, a superweapon with enough firepower to collapse a star. Teska's experiments soon attracted the attention of CountDooku, the leader of the Confederacy. During the Clone Wars, Teska came into Dooku's service and was provided with a laboratory on the planet Behpour in the Naboo system, where the Skakoan continued the development of his weapon.
By 22 BBY, the gravitic beam was complete, and its integral part, the Gravitic Core, was to be delivered to Behpour on a Munificent-class star frigate. However, the crate containing the Core was stolen over the planet Alzoc III by the Duros bounty hunter Cad Bane. Hoping to track the Core by the power signature it radiated, Teska assaulted the Republic space station Juma 9 in order to use its scanners. After locating the part on the planet Ryloth, Teska was confronted by two Jedi Masters inside the station, Obi-Wan Kenobi and Plo Koon. The Skakoan evaded the two and headed for Ryloth. There, he met Cad Bane, who had been taken into custody by the Jedi Knight Anakin Skywalker and his Padawan, Ahsoka Tano, and was being escorted to his starship, the Sleight of Hand, with the crate.
After a skirmish with the two Jedi and two of their clone troopers, CS-2207 and CT-7567, Teska reclaimed the part and stole Bane's transport in order to reach Behpour. When Teska reached his base, Republic SenatorPadmé Amidala arrived on the planet, investigating rumors of a Separatist presence in the system. Teska captured the Senator and held her hostage. Soon, following a message delivered by Amidala, the Republic forces assaulted Behpour. Skywalker and Tano infiltrated the base, and the Skakoan ordered them to surrender, or he would kill the captive Senator. The two Jedi, however, rescued Amidala and engaged Kul Teska in battle in the gravitic polarization beam's core room, while the beam itself built up its power to collapse the Naboo star. Teska was killed, and Amidala sabotaged the beam, causing it to destroy itself and the entire base.