When the existing Monosiell dies suddenly, the long-awaited opportunity presents itself: with Cascari in power Delgado knows he could strike at Myson more effectively, while Myson seeks the strategic value of Seriatt's proximity to the M4 wormhole.
The stakes are heightened as the Seriatts are developing time-travel capacity, using technology extrapolated from the Destiny Mask -- the artefact Seriattic oracles use to predict the future. Delgado knows that with time-travel capability Myson would represent an immeasurable threat, one which he must prevent.
While strange occurrences in the vicinity of the wormhole go unnoticed, on Seriatt the oracles predict the coming of a savior; but who this will be, no one can tell.