It takes the better part of eight hours, to make the run of the first 200 floors, which he'll find easier and easier, each time he attempts it. It's after the first 200 that the fights start to not only rise in difficulty, but seem to be geared, specifically, to screw him over; One floor in the mid 200's featured a swarm of beholders, focusing him with their anti-magic fields, while destroying the floor around him, led by a powerful lich, who attacked primarily with conjurations, such as elemental orbs, that aren't blocked by the anti-magic.<br/><br/>He'll also note that, the more times he leaves and reenters, the more difficult the encounters are, when he descends again, so, while his equipment and skills are improving, the dungeon is growing harder, to compensate, or so it seems.