Epoch 5 Mechs
Mechs are mechanical wonders, varied vehicles, ships, and heavy machinery that make life on Mars (or whichever planet you live on) not just much easier, but fun.
Mechs will require CLNY, resources, and time to produce, and different levels/sizes will be available to different levels or types of players. For example, some mechs are too large for any one person to build, and would thus take a guild. In that way, upper-level mechs can be understood as megas.