Complex sentence: The GLA's unique superweapon is the SCUD Storm, which fires multiple biochemical rockets to a target, which after detonation, destroys most structures and contaminates the land with anthrax.
Split into simpler sentences: The GLA's unique superweapon is the SCUD Storm, which fires multiple biochemical rockets to a target. This attack destroys most structures in the target area and contaminates the land with anthrax.