Slows the sublight movement of a targeted enemy ships and prevents them from Phase Jumping for a short time. Extracted from the game. Gravity Warhead is an excellent ability which slows down groups of enemy ships and prevents them from phase jumping away. In combination with Nano-Disassembler and with a supporting fleet, using Gravity Warhead on retreating enemy capital ships in particular can trap them long enough for your fleet to destroy them. It is often used in a similar manner to the Ion Bolt of the Akkan Battlecruiser.