Starkiller Base

Starkiller Base was a mobile ice planet located in the Beta Quadrant that served as a stronghold of the Der'kal Empire. Commanded by an unofficial triumvirate of General Armitage Hux, Kylo Ren and Captain Phasma, it was armed with a superweapon capable of destroying entire star systems halfway across the galaxy. The Der'kal Empire viewed this ability as an evolution of the planet-destroying capabilities of the battle station designs, with the weapon serving as the ultimate culmination of old research into dark energy]] translations and hyperspace tunneling.

The planet was ultimately destroyed by a Federation attack due to a weak point exploited by pilot Poe Dameron, causing the implosion of the entire planet as the superweapon was firing upon the Resistance base on D'Qar. The stored stellar energy then expanded, causing the planet to turn into a star.