In 4954 DE, there was an explosion that killed 78 D'ni and 400 natives. The explosion was caused by a combination of gases—one naturally occurring, the other brought to the Age by the D'ni. An investigation into the blast conducted by the Relyimah was stymied by a mole within their ranks working for one of the isolationist cults popular at the time. Some suggested that it was set off intentionally, but the claims were never proven. The ultimate result of the blast was an increased push by the D'ni public against outsider involvement.