"Parties?" What in the name of the Emperor are those? Gadriel is also a little fuzzy on the concept of 'invited'. They deployed where necessary. There was no time to wait to be formally invited while the Imperium was at risk.

He's idly watching someone else try through the obstacles over the other's head. When they nearly fall, he twitches, as though he was going to jump after them. "What happens if they fail? Do they become servitors?"