Monan Host The Monan Host were a time - active species who had dealings with the Time Lord s . They were members of the Temporal Powers . History . The Monan Host were seen as a credible threat to the Braxiatel Collection . ( PROSE : " Parallel Lives " ) The Monan Host attended a meeting of the Temporal Powers and were somewhat hostile towards the Time Lords . In the incident that followed , the Monans , among the other Temporal Powers , faced a brief but devastating invasion of their homeworld by the Dalek s which decimated their population . Lady President Romana II of Gallifrey promised to provide aid in the rebuilding of the fellow Powers . ( AUDIO : " The Apocalypse Element " ) The Monans generated an occlusion field to prevent other temporal powers from peering into their history . However , the Nekkistani managed to learn that an incident caused time and space to buckle around the Monan homeworld . This put the planet in contact with itself in ten different historical periods . This resulted in the most advanced Monans conquering their ancestors whereupon they studied and harnessed the time fields which allowed them to stabilise the ten planet s into a single host system . ( AUDIO : " Square One " ) A Time Lord President once left Gallifrey to negotiate with the Monan Host . ( AUDIO : " Songs of Love " ) The Monan Host was one of the Temporal Powers . When their ship " Moros " was at the point closest to Gallifrey , it became infected with a computer virus that caused it to kill its crew and begin to collapse into a singularity . Romana II went on a mission to stop the core collapse . Originally , she regenerated in order to obtain the energy to stop the collapse ; however , during the war that began after the Omega incident , Romana III sent Irving Braxiatel back to stop Romana II from regenerating on the " Moros " . As a result , the core collapsed and became a black hole . The Monan Host , believing that the Time Lords had planted the virus , evacuated their embassy in the Capitol . Thirty minutes before the last representative left , Narvin was mysteriously murdered in the Matrix archives , causing many to suspect that the Monans had killed him . This fear escalated when the Monan embassy exploded and killed over a thousand Time Lords who had gathered for the inauguration of President Livia . In response , Livia formed an alliance with the Warpsmith s of Phaidon and declared war against the Monan Host . However , the virus and terrorist attack were later revealed to have been part of a plot by Livia ' s Castellan Plutus and the Warpsmiths Kalbez and Gaal . Later , Romana II and Leela again changed the fate of the " Moros " by dying and stopping the core from collapsing . ( AUDIO : " Enemy Lines " ) The Monans were exterminated by the Daleks at the onset of the Last Great Time War , which , along with the extermination of the Nekkistani , Sunari and Phaidonians , led to Gallifrey formally declaring war against the Daleks . ( AUDIO : " Desperate Measures " ) Alternate universes . In an alternate universe where the Time Lord s sold their technologies to other races , the Monan Host received Time Ring s from them . ( AUDIO : " Reborn " ) In another alternate universe , the Monan Host were hunted down to near extinction by the Valeyard due to their time - sensitive nature . The last Monan was held captive in Chronopolis . ( AUDIO : " He Jests at Scars . . . " ) Technology . The Host ' s temporal technology was , in some areas , even better than that of the Time Lords , though they never managed to achieve dimensional transcendence . It was known that they possessed a form of timeships though all attempts at replicating their technology had failed . ( AUDIO : " Square One " ) The timeship that the Monan Host brough to Archetryx resembled a grey box . Its engines were powerful enough to cause a slipstream of temporal disturbance on its own . ( AUDIO : " The Apocalypse Element " )