- Thrull is a planet in the Generation One continuity family.
The Transformers cartoon
Spending such a long time buried in one of Thrull's pools of lava plasma severely damaged Galvatron's mind, driving him stark-raving mad.
After learning his location from Unicron's databanks and collecting some Energon cubes from their fellow Decepticons, Cyclonus and Scourge went to rescue their master from his imprisonment. After violently attacking his own troops for attempting to steal him away from his "kingdom of desolation", Galvatron left Thrull, but not before he could destroy the planet for no reason at all while cackling wildly.
Galvatron's pretty crazy.
- Dreamwave produced a poster of Galvatron emerging from his lava bath where the planet was misspelled "Thrall".