It isn't like he hasn't been open with a handful of people about what happened in the Hunting Grounds. Well. His version of course, which is certainly the most complete accurate telling of any story. Far as he's concerned he didn't make the first move; Dean and his wing mockery was a blow all on its own. An attack, though not physical.

He told Istredd no one from Thorne was involved.

He gave Kyle a very vague answer.

He pushed Cadens attacking him for "what he was" at Wilhelm.

He knows nothing about Kell--where he falls on the political spectrum, now more than ever. Would putting a further target on Cadens make a difference to Kell? Would admitting that other Summoned did damage to Lucifer make things worse for him after talking up being an archangel?

He honestly hadn't expected Kell to bother asking and now he's walked himself into part of a conversation that he doesn't know which way to lean. The easiest solution is throwing it out entirely, but he likes finding advantages in conversation.

But he knows the answer as soon as the question sparks in Lucifer's mind. Because the problem with Kell, proven by his presence in the gardens, is that he's too volatile to predict.

So he goes for the route he hasn't yet.

"I was stupid," he admits, "I was attacked by other Summoned--not a hassle in itself, but I used too much power." He laughs it off. "Haven't had to use it here in Thorne, you know?"