Magmara Nine

Magmara Nine was once a rich, affluent world, but has now degraded into a lawless, magma-covered ruin nicknamed "the Cauldron".

Fiction

2005 IDW continuity

Scorponok's rule of the Decepticons prompted many of them to abandon the army and Cybertron, searching for better options. Working off of tips from Swindle, the Stunticons were acting as highwaymen on Magmara Nine when Thundercracker arrived to tell them Megatron had returned. Primacy #2