As it turned out, demons are actually lousy at keeping secrets from each other. Most of the army knew that Cain had been blessing some of them with Mythic abilities and that he was likely to do it a few more times even before he left the meeting hall.
Some of that, or most of that, was probably due to Carnage running around with his new flaming Ax, but the news still spread faster than Cain was expecting.
The beaches seemed to have been mostly cleaned up already, thanks to the combined efforts of the Demon army, and the Wave Riders had joined them for the party. Large bonfires were already burning all around the army's camp and Cain could smell food cooking from every direction. As he knew well, it takes a lot to feed an army, so he would have some time to be sociable before food distracted everyone.