Interplanetary missiles destroy enemy defense on objects. Defensive structures destroyed by interplanetary missiles, defensive structures are no longer being restored. The maximum flight distance is 100 * [the level of Impulse Drive] ^ 2. A missile can be stopped by Anti-ballistic Missiles or 2 Broodlings.
If an interplanetary missile arrives at target during the combat, it can be intercepted by Broodlings that are in battle. Defense structures that are participating in battle also can be destroyed.
Can't be directed to Grendizer.