"The Lord of the Thirteenth?"
Vael's knowledge of the Imperium's deeper secrets wasn't great, but this wasn't... His next words show genuine surprise.
"What, Guilliman? Fucking hell, are you joking?"
Again, in summary. The Ultramarines head honcho Guilliman sits on the God-Emperor's throne and wields his sword. Warmaster Abaddon wants to provoke him. Xuanji Tu is part of that provocation. And Foroch is muddling the waters by mixing together the events on Xuanji Tu, and the events in the imperium at large. Guilliman and hordes of the Ultramarines probably weren't literally on this planet. Probably. Obviously not.
"Alright, so Xuanji Tu is a microcosm rendition of the campaign as a whole then. I see. It'll be an interesting challenge. But like every story, every war ought to have a good beginning. Where would you recommend we begin? Sending waves upon waves of men to gnaw at the anti-air batteries feels passé."
Vael turns around and speaks to his shadow, making it perk up at attention.
"Go to the archivists - convey the order to find blueprints of the imperial palace on Terra."
Good luck with that pantomime. Wish he was there to see it.
"No copy is perfect, and Xuanji Tu is no Terra. They can not match the ground, so they must have made adjustments. And they are no Rogal Dorn. If the planet is 'cutting itself', we could amplify that. Amp up the seismic activity with some deep bombs, see how they like it when the ground itself is trying to shake off their walls."