The party started between the two remaining buildings of The Maker‘s workshop. One of the buildings had an intricate chain holding it shut, and Falchion managed to gum it up while trying to open it, so the adventurers went to the other building.
It was a smaller, square building with no apparent door. One wall was dominated but a 20ft-diameter fan, sucking smoke out of the building. Arn slowly climbed one of the walls to find the room had no roof and contained a huge anvil, a smoking forge, a quenching/swimming pool, and two massive pillars hung with blacksmithing tools. Three steel sentinals worked in the room. Arn lassoed a nearby pillar so that Shivers and Breeze could climb up the wall as well. Falchion studied the spinning fan while the rest of the party climbed, then leapt through the blades as Shivers and Arn dropped into the room.
The party engaged the sentinals, and the mercurial caryatid and adamantine colossus appeared as well, rounding out the guardians as they had been in the previous rooms. One of the sentinals slammed into the wall on which Breeze was balancing, knocking her to the ground outside. The colossus stood in the forge fire, which clearly damaged him, but turned his massive chain white hot, and he whipped party members with it, doing extra fire damage.
The caryatid turned invisible and weaved in and out of combat while the party, hedged into a corner, tried to deal with the sentinals. Eventually, the sentinals went down, and the party turned their attention to the colossus, which leapt into the quenching pool. The party switched focus to the caryatid, and the colossus surged out of the water, grabbing up the giant anvil and hurling it at Shivers standing in front of the fan. The anvil slamed into him, knocking him into the blades, but the anvil also hit the blades, stopping them, so Shivers was not sliced to ribbons. The room began to fill with choking smoke, but the party quickly finished off the guardians, grabbing the third Forgestone.
After a short rest (where Falchion used the three Forgestones to regain healing surges), the party smashed through the stuck chain barrier and descended into the final guardian room. Stone guardians were mining in the cavern. Two sentinals and a colossus were visible when the party entered the room, but the caryatid came out from behind the colossus to dominate Arn. Attacking the caryatid, the party realized that the sentinals were taking half the damage of their fellows, so the party focused on the sentinals, one by one, trying to avoid the caryatid’s aura and not get smashed by the giant stone colossus. Eventually all the guardians were destroyed, and the party acquired the fourth Forgestone.
The tinker had told the party they would be able to rest after acquiring the last Forgestone, so the party did so, waiting for The Maker to come and engage them.
As the party rests, a towering pillar of black smoke continues to rise from the forging workshop, likely visible for miles.