The Magna Prime is a ship utilised by the Mechanic on several occasions.
The Mechanic detaches the Magna Prime from the self destructing Earthbreaker.
City Under The Sea
The Mechanic utilises Magna Prime as the cockpit of the Crab Ship.
Up from the Depths Part 2
The Mechanic can be seen onboard the ship whilst watching Lady Penelope, Parker and Kayo unmask the decoy.
The Mechanic used the Magna Prime to escape with the batteries, although the Hood hacked into some of his Air Mechas causing them to self destruct. This forces him to ditch the batteries and retreat.
Home on the Range
The Magna Prime appeared briefly when the Mechanic made his escape.