White Cages are seemingly indestructible structures (only destroyed by Network at full strength), presumably created by anyone Armed with Wings, although Lone Warrior is the only individual who has done it, both while Armed with Wings and not. This technique introduced in Armed with Wings 2, and used again in Armed with Wings 3. Lone Warrior first uses it to seal Vandheer Lorde away at the end of Armed with Wings 2, but he remains trapped throughout Armed with Wings 3 until freed by Network. Lone Warrior then seals them both for a very short time, allowing he, Leo, and Eivana to escape.
