Commander Corrosionbird

Replaces Firebird with a new commander. corrosionbird : Passive : Can build brittle materials (cheaper than regular building materials but with less HP). Smoke Bomb has no prerequisite. Active : Smoke bombs shoot corrosion bombs, corrosion bombs convert materials around their impact point into brittle materials. Replace them with normal materials to repair. Why does it replace Firebird ? Saddly the game doesn't allow mods to introduce a new commander. The only way to do so is to replace an existing commander with the modded one.