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Spoilers for Books 1–8
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Access item · Introduced in Book 1
Master Pen Key
The Master Pen Key lets its holder choose one room in the kennel. The party uses it to reach Mongo, but still has to meet the other requirements for making him a pet.[1]
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History
Book 1
Dungeon Crawler Carl
The party chooses Mongo’s room and offers him pet biscuits. Reaching him and feeding him begin the attempt to form a bond; he does not become their pet immediately.[1]
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Sources
References are to Matt Dinniman’s novels. Book links open our recap guides.
- Dungeon Crawler Carl, Chapter 46.