Mastema is a Heavy Frame based Skell model. It is excellent in distance combat because it is specially designed for Ranged Attacks. However, due to a very high weight it is difficult to maneuver. Its vehicle mode is multi-legged, bearing resemblance to a spider. The level 30 Mastema frame costs 440,000 Credits and the level 50 frame costs 3,520,000 Credits. Its standard equipment is the shoulder-mounted "M-Sniper", specially developed alongside this model.