same as aurora 4x you can use the mass driver both to transfer minerals if the other end has one of equal strength to capture them or bombardment. heck it even

same as aurora 4x you can use the mass driver both to transfer minerals if the other end has one of equal strength to capture them or bombardment. heck it even simulates the bombardment dust cloud triggering a runaway cooling and subsequent ice age of you send enough mineral packets in short time!