This is really just for a bit of fun.
If on Character Creation you create a FIGHTER and put War Machine in the Subrace field. You will enter Dalakora in the Obsidion Empire as an Obsidion Empire War Machine.
All this does really is change your appearance to that of a War Machine and put a permanent polymorph to a Mithril Golem on you. That means you get 300 extra Hit Points, All the Golem immunities, the Golem’s A/C, Base Attack Bonus, Creature Weapon etc., BUT none of the special abilities.
You CAN go up levels but since you are in permanent polymorph form that would not make a lot of difference.
Also when you Die as a War Machine, there are no Death Penalties and so on, you just immediately respawn in Klatuul Obsidious.
As I said, this is just for fun BUT can be used for player run scenarios like an army of War Machines invading Manay for example or a even a pitched Battle in No Man’s Land .