Thankfully, he seems to have little to worry about; the two dragons are quite powerful, and more than a match for the mostly mindless undead. Even those that can even reach them, to pose a threat, don't stand much of a chance; Garven has the ability to allow her breath weapons to fully affect those on the etheral plane, allowing her to blast ghosts and wights that might try to threaten them.<br/><br/>The first demilich fortress is fairly impressive; what looks like a massive construction, both above and below ground, filled with twisting hallways, meant to confuse lesser beings, filled with traps and other nasties, which would make it extremely difficult for any mortal party to assault, as well as would give the demilich a significant amount of warning, especially as to the capabilities of the party that might be assaulting it. The others seem to use similar designs, though each has a particular theme to it; one has an unquestionable ice theme, which makes the fact that many of the traps are<em>not</em>ice-themed even more deadly, and the last actually inhabits the negative-energy plane, a small pocket dimension, down at the very heart of its lair.