ValhallaGH
Explorer
Lava. Because every boss fight should have lava. Or a raging thunderstorm. If you can swing it, combine the two and have a thunderstorm of lava as they battle a mile or two in the sky. Cheesy but it adds a ton cool to the scene and provides a lot of unconventional tactical options to creative players (on either side of the screen).
Animated anything / everything. Statues, columns, walls, floors, air, whatever. The real idea being to provide some crazy-looking giant monsters.
Traps. Nothing says "deceitful and treacherous" like having oodles of traps. Given the level and power of the PCs, most of these traps should be disguised, treacherous, and involve multiple hazards. They should also be easily avoidable by magic users in the know (this is[/i] his house, and he doesn't want to constantly trip over his own things).
Best of luck.
Animated anything / everything. Statues, columns, walls, floors, air, whatever. The real idea being to provide some crazy-looking giant monsters.
Traps. Nothing says "deceitful and treacherous" like having oodles of traps. Given the level and power of the PCs, most of these traps should be disguised, treacherous, and involve multiple hazards. They should also be easily avoidable by magic users in the know (this is[/i] his house, and he doesn't want to constantly trip over his own things).
Best of luck.