Base Raid
Overview
A Base Raid is a form of Supergroup PvP that was announced some years ago. In a raid, members of one group would attack the base of another group in an attempt to steal Items of Power. This is a battle, or a set of two battles, between two Supergroups, both of which have suitably equipped bases. The battles are set in the target SG's base, which may be fortified by special defenses used only in a raid.
At one point, the Devs planned to have raidable bases house one or more Items of Power, which could be stolen by a raiding group. However, as of this writing, the Cathedral of Pain Trial during which the IoPs are obtained is unavailable. Prior to Issue 13, base raids were just done for fun and bragging rights, however with the release of Issue 13 the base raid feature has been turned off.