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In the Creation War (1486 DE - 8777 DE), the Henmona Rift was opened by a primordial minion wielding Webreaver. This minion was disintegrated when the blade sliced a gap in the Web, creating an inter-system rift between the primordial ruled world of Nasudex and the Covenant protected world of Kriav. With the rift's opening, Piranoth's primordial armies invaded Kriav. They dominated Cilarrion and regions around the rift very quickly, turning the area into a depot for future operations.
In 6744 DE, the rift was closed by the Golden Seven. Cut-off, the primordial hold-outs were eventually wiped out.
On 5 Hollow 92 GE, a demon lord named Sathumort re-opened the Henmona Rift by using the Webreaver. Through the inter-system rift, his forces left the world of Nasudex for the Cilarrion Region on Kriav where they battled with the Covenant forces under Corellon.