Found at the end of Base 1. In order to fight it, the player must first destroy the four power cores affixed to the wall, and is also advised to destroy the two multi-cannon turrets protecting the system, although these are not mandatory.
Once all four cores are destroyed, Garmakilma will appear on the topmost panel, moving from side to side while constantly unleashing rings of fire at the player; these can be destroyed by shooting them in midair.
It is advised to take the two defense systems as soon as possible before they have an opportunity to shoot, or stay on the safe spots left between their spreading fire. Weapons which can provide heavy accumulated fire, and a wide range for taking care of oncoming indirect fire, such as the Spread Gun, are recommended.