The fighting in the Gladiator Arena below was extraordinarily fierce, while the spectator stands...
The warriors could not even make out the movements of the two Primarchs. Red River's Primaris Big Bosses began putting their Ork belief to work.
Ashlan led the Primarch's Guard in frantic laps around the Arena. There seemed to be nothing separating them from it, yet they simply could not get inside.
It was as though a Wall of Air stood between them.
I reckon this is a Projection Screen. The Primarchs are fighting somewhere else.
The warriors began searching for any passage connected to the outside, opening every door and passing through lavishly decorated corridors.
Ashlan pried open every window with his longsword. Expensive glass shattered across the floor, but there were walls behind those, too.
The Primaris Warriors began trying to tear down the walls, smashing every object that could refract light, including mirrors and Glass Ornaments.
They pulled up the carpets, climbed atop the Icons, and gathered everything that could be moved into a pile off to one side.
Fulgrim stole a glance to the side during the fight. An enormous heap of rubbish had risen in the spectator stands. Paintings hanging in the passageways, chairs, tables, cupboards, rugs... everything had been piled together.
And they had piled it beside the "Wall of Air."
"Look at your Legion. They're as stupid and deranged as Orks, without the slightest sense of artistry, destroying everything beautiful like barbarians."
The Khan showed no reaction. He took the favorable part as a compliment and left Evan to shoulder all the blame for the rest.
A moment later, the rubbish heap blazed. The Primaris Warriors had set it alight.
A group of Primaris Warriors gathered around the fire, looking as though they were conducting some Chaos Cult ritual.