Antiwarp is a tool that will deny all enemy ships in near you to warp, attach or drop a portal. Antiwarp will drain energy from your ship's reserve, and it will stop working if your energy is depleted. Some ships have it enabled by default, and some will have to collect greens to get it. Use antiwarp when you are trying to chase an enemy into a dead end or he will simply warp out.The same is true when you are trying to nail someone with a burst. Although it's a slight disadvantage when you turn it on (it costs energy to maintain), the bright side of this is that if you corner an enemy and are about to deliver the final blow, that he won't simply warp to safety. This can be very frustrating, since it probably took you some time and required you to take some risks to get him in that position. In Warzone games, antiwarp is especially important. A spider can sneak in (cloaked), drop a portal and get out again. He will get his entire team to attach to him and warp back, dropping 6 fully charged enemies in the center of your base, quickly killing all your teammates and stealing your flags. Always have someone with anti turned on at your base to prevent portalling. If you suspect that a portal has already been dropped somewhere, then mine the hell out of that place. The entire team will get killed if they warp inside that minefield.