One of the more fascinating bits of information to be gleaned from Tonisborg is a section which reveals Arneson’s methodology of stocking dungeons. For those of us who have used Moldvay as our go-to guide for creating dungeons, we might expect an Arneson dungeon to have monsters in about one third of all rooms. If you are exploring dungeon levels 3-6, this is exactly what you would find; however, only 1-in-6 rooms on dungeon levels 1 and 2 have monsters and half of the rooms on dungeon levels of 7+ are occupied.
Each room that has monsters is assigned what are called “Protection Points” — a randomly determined amount of hit points that are used to “buy” monsters with. As described in Tonisborg, the number of Protection Points are based on an average party size of 4 to 5 PCs. Unfortunately, I found the table provided to be a bit confusing, but was able to take the concept and the described math to provide a very simple metric for determining the number Arneson’s Protection Points:
(1d6+1)(Dungeon Level) per PC*
*This assumes that that HD are based on a d6. This die would shift depending upon what the standard HD is according to the edition used.
Thus, if I were stocking the second level of my dungeon, I would be rolling 2d6+2 Protection Points for each PC in the party. So, if my party had 3 PCs the total number of Protection Points would be 6d6+6.
Additionally, Arneson had a “one sixth principle of monster variation.” On top of the dice rolled above, an extra d6 is rolled. Should that d6 result in a ‘6,’ there is a 50/50 chance that the number of points are halved or doubled.
Thus, in the example above, an average roll would result in 27hp; this would be halved to 14 hp or doubled to 54 hp with a ‘6’ on the variation die.
I have yet to try this method at the table, but in principle it does several things:
1) It clearly sets up the expected danger of each dungeon level while allowing for some encounters to be surprisingly easy or hard.
2) It despenses with the need to roll for the number of monsters encountered or for hit points. Both are simply assigned based on the number of Protectin Points avaible. In a way, it frees up the Referee to more exactly tailor their dungeon.
For example, our room on the second level has 27 Protection Points. This can be a typical encounter of 2HD monsters like 3 gnolls with 9 hp each. Or, it could be a bit more ridiculous with 27 goblins with 1 hp each. Or it could be a bit more chellenging with a single 5HD creature like a griffin with 27 hp.
3) It allows for a kind of short hand when designing/stocking a dungeon. I can simple indicate the number of protection points each occupied room has and assign these points to monsters on the fly depending on whim, need, or random roll. It gives me the freedom to adjust some of the difficulty of a room by increasing or decreasing the number of potential attacks. For example, if I wanted to buy gnolls with my 27 Protection Points and my party needed a bit more of a challenge, I can increase the number of gnolls to 9 with 3 hp each; however, the overall deadliness of nine gnolls is somewhat mitigated by the fact that each will die from average hit from a PC.
This is an idea that seems far more practical than Challenge Levels and their equivalants in the modern game. It will also be something I will have to experiment with to see how it actually plays. Nonetheless, fascinating stuff!
