Board Thread:Warhammer 40k General Discussion/@comment-25618639-20150426193759/@comment-25177957-20150430052110

ImperialFist31 wrote: If the Dyson sphere was built to imprison the Outsider, wouldn't it be built by the Necro, since they were the ones who defeated the C'tan? My best guest is that it was built by the Old Ones, but it could also have been the Necrons, Cegorach did trick the Outsider though, so it's possible the Old Ones built it long ago, then Cegorach tricked the Outsider into it.