Horus Heresy 54: The Buried Dagger (2019) — Interval VII: The Fall

'What have you done?' breathed Mortarion. 'If there is any of the comradeship still in you that we once shared, tell me why you have trapped us here.'

'I regret I had to lie to you,' Typhon admitted. 'But it is better this way. The Navigators were plotting, that was true, but not as I led you to believe. Killing them ended a threat before it was fully formed, and allowed me to bring you here. To see the Grandfather's bounty first hand.'