In the six hours that passed, Niara joined the group as well, gasping in shock at the capacity of the portals. "Let me help... the enemy's going to be bringing in portals of their own, or trying to close yours. I'm particularly adept at portals." If she can't help with maintaining, or even reinforcing, she'll inform him where he needs to direct his energies, to shut down the enemy's teleportation efforts.<br/><br/>The rocks have quite the impressive effect; slowed as they are by the walls of the fortress, made out of an incredibly tough material, still have an incredible impact, and the splinters of rock from the holes in the wall inflict further casualties, but, despite the damage inflicted, the losses are not a significant portion of the enemy forces, and the walls are still mostly intact and relatively undamaged, aside from big holes blown in them, almost the exact size of the rocks. There's a few minutes of general confusion, but, thanks to telepathy, the invading warriors are quickly identified, and the demon hordes begin to converge on them with alarming speed, hundreds, if not thousands, of demons, of all shapes and sizes, racing towards the open portals, demonic magic of all kinds being hurled at them, as the slavering horde closes in.<br/><br/>There are, unfortunately, quite a few slaves, throughout the complex; mostly engaged in demeaning labor, when not being tortured or enjoyed, a not insignificant number are killed in the initial bombing, since it's almost impossible to pick a place where there aren't a few, and there are, in fact, a number of mortal spellcasters mixed into the army, making identifying rescuees even more difficult.