Since the PCs have been taking their time looting the Chamber of Antiquities beneath House Vladaam, I thought that it would make sense for the Vladaams to send a party after them. I used NPC Designer to come up with a party of 4 half-fiends, each with a CR of 20. This resulted in a detour session of combat.
As they started the evening’s exploration, they found a room with a warning on the door (they left that door alone), a room full of shoes, and a room full of robes.
The human unfettered rolled an impressive listen check, so I let her hear a distant thump as the House Vladaam team broke through the secret door at the top of the stairs. The spryte greenbond snuck up the stairs and spotted them. As she made her way back to the party, they spotted her and began using their Summon Monster IX ability. She blasted them with a fireball and so they missed their concentration checks, interrupting the summonings. [1]
The HV team raced after the greenbond and ran into the warmain and the unfettered. Between the two of them, they slaughtered the rogue/shadowdancer [2]. The giant fighter charged into the room, while the cleric and wizard took up support positions.
The unfettered nailed the HV giant fighter pretty hard, and a series of pitiful rolls left him unable to hurt the PC warmain. The wizard tried for feeblemindedness on the warmain, but he rolled an impressive will save. The cleric did a heal on the giant fighter. Then the PC greenbond blasted the cleric and the wizard with a sorcerous blast, and the warmain took a big chunk out of the giant fighter.
Another series of shots from the unfettered left the giant fighter reeling. He did get a chop in at the warmain, but the wizard decided enough was enough and put up an icewall between them. The cleric went for a mass cure, the greenbond shot another sorcerous blast and ducked behind a wall, and the warmain ran around the icewall.
The unfettered continued to blast the giant fighter. He grabbed the shadowdancer/rogue’s corpse and ran. The wizard put up an icewall across the entrance. The cleric started to run, but got nailed by the greenbond’s sorcerous blast [3].
The warmain and greenbond destroyed the icewall and the party set off in hot pursuit. They chased the team most of the way up the stairs. The unfettered’s fancy bow rolled a force effect and nailed the wizard after she had cast wind walk. The greenbond put up a sonic wall and blocked the exit. The giant fighter, as the only one left standing, dragged his comrades back to the Pool of Afterthoughts in the Chamber of Antiquities, both to hide and to get restored. The unfettered remembered the special qualities of the pool - it transfers bathers to the ethereal plane (making them invisible to those on the material plane) and speeds healing. When the warmain stepped in there and found the remnants of the House Vladaam team, it was all over.
The PCs finished the evening by opening a granite door they had found earlier. Inside was a table with some tools on it. The table is surrounded by a wall of force, which is surrounded by an anti-magic field. We stopped there so that they can think about how they’re going to get through this.
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Notes
[1] First big mistake on my part - I forgot to ignore the first 10 points of fire damage. Some of them should have made their concentration checks. They should also have cast some buffing spells. As experienced adventurers in hostile territory, they should have had someone standing guard during the summoning spells to prevent just this kind of interruption.
[2] Second big mistake, the rogue/shadowdancer had a ring of blinking that I forgot about. Had I remembered, she probably would have survived another round and shadow jumped behind the unfettered as I had originally planned. Actually, she should have stopped to get her bearings and shadow jumped into the room rather than coming through the doorway. Too bad my Int isn’t as good as the NPCs’.
[3] Big, big mistake - when the House Vladaam team ran, they should have used wind walk or a plane shift or some such (they had those spells available to them). Instead I had them physically run out, which gave the PCs time to catch up and destroy them.