Changes

The Rock was again besieged during hte [[Arks of Omen Campaign]] as part of the [[Daemon]] [[Vashtorr]]'s plans. [[Arks of Omen Campaign_#The Siege of The Rock|ambushing and boarding the mobile fortress]], Vashtorr sought a [[The Key|Key Fragment]] which was sealed within one of The Rock's deepest vaults. Vashtorr's raid initially was on the verge of succeeding until [[Be'lakor]] intervened and allowed for nearby Imperial reinforcements to arrive. Enraged and with his plan in tatters, Vashtorr retreated.{{Fn|12d}} Shortly after, The Rock and a massive [[Unforgiven]] armada pursued Vashtorr to the [[Somnium Stars]], where in the subsequent [[Battle of Idolatros]] Vashtorr acquired the Key-Fragment he had originally sought: The [[Tuchulcha]].{{Fn|13}}

Unknown to the Dark Angels until [[Cypher]] informed them, for the last ten thousand years The Rock has had the ancient sentient device known as [[Tuchulcha]] hidden within it.{{Fn|4}} The device was later extracted by [[Vashtorr]] during the [[Battle of Idolatros]].{{Fn|13}}