The bite of the athame will free Guilliman’s sanity while he is in such a state, slice away his inhibitions. The painful burn of the athame wound will fester in him, and ultimately, through the lens of delirium, reveal the Primordial truth in all its hellish glory.

...

Kor Phaeron puts the blade of the athame to Guilliman’s throat.

...

The athame bites. Guilliman’s blood wells up around the sliced flesh. He grunts through clenched teeth.

‘Let it go,’ whispers Kor Phaeron. ‘This is the beginning of wisdom.’

Guilliman mutters something in reply.

‘What?’ asks Kor Phaeron, cupping a hand to his ear, mocking him. ‘What did you say, Roboute?’

Every single word is an effort.

‘You made an error,’ Guilliman gasps.

‘An error?’

‘You chose the wrong practical. You had a choice. Toy with me. Kill me. You chose the wrong one.’

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