If anyone wants to try a prompt to turn the key into some rooms, here is the raw key data:
Design Key: Castle Greyhawk, Level 1
1,-,Kobolds,9-16,5,63,-,"Dust colored silver mirror, 750 gp"
2,-,Goblins,7-12,8,71,-,10 gp
3,-,Giant Rats,3-12,5,38,-,Potion of strength
4,-,"Bandits, warrior leader",10-16,150,-,-,"+1 shield, potion of undetected control, 1000 gp"
5,-,Giant Centipedes,5-8,6,39,-,-
6,-,Hobgoblins,2-3,15,38,-,"+1 battle axe, gem 400-800 gp"
7,-,"Giant black widow, skeleton in plate",2,106,212,-,50 gp
8,"Iron chest, empty (false bottom)",Needle trap,-,-,-,"6 gems @200",1200 gp
9,-,Orcs,3-7,50,50,"Chest w/8 flasks oil",30 sp, 8 gp
10,"Water seepage",-,-,-,-,-,(drink!)
11,-,Giant Constrictor,1,650,650,"Gems inside (1-4) or nothing 50/50",-
12,"Rustling corridor (no bats)",-,0,-,-,-,-
13,-,Skeletons,2-5,10,35,"One piece of jewelry, in pile, d10 x 30",-
14,Rustling,Giant Bats,1-2,175,263,-,-
15,-,"Giant Stink Beetle (2 attack in 5')",1,275,275,"Nothing/10-100 sp & 1-10 gp",-
16,-,Berserkers,3,19,57,"Ring of protection, 20-40 gp each, Idol with curse (-1/3d)",90 gp
17,-,"Seer (chaotic, light, charm person)",1,25,25,"+1 dagger, spellbooks, 1-20 gp",-
18,-,"Evil adept (cause light wounds) & gnoll",2,44,54,"Staff of healing (6 ch.)",-