Worldburner

Worldburners are a class of Cybertronian capital ships designed to raze whole planets.

2005 IDW continuity
Designed to sterilize planets,  the Worldburners were a surprisingly ancient class of vessels; ships much like them were already in use in the years preceding the First Cybertronian Civil War, with several taking part in Cybertron's invasion of Antilla. The Worldburners possessed enough firepower that Starscream viewed one ship of the class as capable of destroying multiple planets.

The Worldburner Nemesis survived the Great War and eventually returned to Cybertron where it was eventually seized by Galvatron's Decepticon cell and used for their voyage to Earth.

Anticipating that a large existential threat would one day rise, Starscream sent out Bludgeon to rally all the scattered Decepticon cells of the galaxy into a massive fighting force he dubbed the "Decepticon Vengeance Division" which made significant usage of Worldburners. When Unicron began consuming the Cybertronian colonies, Starscream ordered his new fleet to contain and destroy the monster-planet at G Nebula 89. Unknown to Starscream and the DVD, Bludgeon was secretly loyal to Unicron, with the DVD failing to make a dent in the Chaos Bringer who warped them all into his service, mutating the ships and their crew into Maximal-like forms, bringing them to Cybertron to serve as his heralds. Once Unicron had destroyed Cybertron, the Worldburners quantum jumped to Jupiter and destroyed the Sanctuary Station.

When the combined forces of Cybertron, Earth, and Elonia mounted an assault on the DVD, what few Worldburners that remained in the fleet were destroyed.