|This page contains spoilers for:||Grey Knights (Novel)|
It was built using alloys and construction techniques that cannot be reproduced. The Rubicon served as the strike cruiser for Justicar Alaric while he searched The Trail of Saint Evisser for the daemon Ghargatuloth. It was destroyed in the atmosphere of the planet Volcanis Ultor after sustaining heavy damage. Both of the Imperial ships Unmerciful and Holy Flame were unable to stop it from reaching the planet's atmosphere. The ship was finally destroyed by the Absolution Beta when it was rammed, and both ships were destroyed.