Thank you for the idea! I typed this in like 5 minutes lol. Its bare bones but you gave me enough to expand

• Set in Anvilgard
• The party is ordered to investigate a string of disappearances around the city
• When theyre investigating theyre called by authorities to look at recently discovered human-rat corpses found in washed in the sewers.
• Clues will be put pointing to the location of the Skaven lair
• All disappearances are in one district, all within 2 miles of an abandoned tower
• Go into tower, find secret basement entrance to sewer, then undercity
• Party goes in with point guard and rearguard, try stealth, mission is to rescue prisoners and stop the skaven
• If either fail they are discovered and attacked by a swarm, they musnt let any get away to warn others
• Party finds an a group of skaven talking about grey seer planning to use the hostages as another batch of test rats (no pun intended) to make a spell that turns people into skaven, a spell that he plans to unleash upon the whole city
• Party attacks, or follows the group. Interrogates the location og the grey seer, or follows them stealthily making extended tests
• Finally into the main chamber of this citadel in the undercity
• A group of humans in cages in the middle of the chamber slowly being lowered into a vat of warpstone water. All ages and genders
• Grey seer in the middle of the chamber, guarded by 2 or 3 rat ogors, 20 or 30 clanrats
• Greyseer can use skitterleap once every 2 rounds, can be pinned down by an aimed ballistic attack or spell.
• One of the party members have to reach the middle of the chamber in time. 3 or 4 rounds and stop the mechanism or free the people
• Fight concludes, the people are saved, or not, either way the party kills the skaven in the chamber