Lucifer

All it took to destroy Lucifer was a fat guy.

The planet Lucifer (ルシファー Rushifā) is a world under the command of the Decepticon forces. Heavily fortified and very unpleasant, it is not a place for tourists.

Fiction

The Battlestars

Fearing that the Autobots might attempt to resurrect their fallen leader, Optimus Prime, the sinister Dark Nova spirited his corpse away to the heavily foritified Decepticon planet Lucifer. Go Forth, Grandus of Justice!

The Battlestars fought past the hordes of Novaroid drones, storming planet Lucifer and securing Prime's remains. Sky Garry then used the power of the Zodiac to bring Prime back to life as Star Convoy. Resurrect the Legendary Hero, Optimus Prime!

Grandus then stayed behind on Lucifer to flush out the remaining Decepticon forces there, while Sky Garry mopped up the Novaroid and Galaman drones out in space. The Battlestars

The AllSpark Almanac

It is said that, under the steel-fisted (don't even go there) rule of Lord High Governor Straxus, the place has gone from "oh boy" to "oh hell". If there were a tourist attraction, though, it would be the numerous smelting pools that take care of both energy-related needs and insubordination of all kinds.

After the Decepticons had lost the Battle for Iacon, and thusly, the Great War, they were exiled from Cybertron. After a period of recuperation, they slowly began to rebuild their empire by colonizing several far-off planets, Lucifer amongst them. Straxus was given governorship of the planet, most likely as a reward for his wartime services. The AllSpark Almanac II

Notes

• The description of the planet in Animated continuity is highly reminiscent of Cybertron under the rule of Straxus in the Marvel continuity.