[DF] Placing areas of different mana in Dungeon Fantasy

[maximara]

Originally Posted by Taneli

Roll 3d6 for each area that comes up and hasn't been resolved yet. High number indicates high mana, low number indicates low mana, 18 means very high mana and 3 means no mana.

If you want to get really fancy you can use the -10 (no mana) to +10 (Very high Mana) of continuous mana with normal (0) on 10 (this is where the cumulative percentage is 50.0%) with each number ±2.

Yes this makes 15-18 No mana but the cumulative percentage of getting 15 or higher is 4.5% (100.0-95.4) which is effectively a 1 on a d20 (auto failure under 1 and 20 rule)

[Varyon]

Originally Posted by maximara

If you want to get really fancy you can use the -10 (no mana) to +10 (Very high Mana) of continuous mana with normal (0) on 10 (this is where the cumulative percentage is 50.0%) with each number ±2.

Yes this makes 15-18 No mana but the cumulative percentage of getting 15 or higher is 4.5% (100.0-95.4) which is effectively a 1 on a d20 (auto failure under 1 and 20 rule)

This also means -2 mana (roll of 11) is as common as Normal (roll of 10), which feels a bit... off. Unless you're saying it's Normal Mana for a roll of 3-10, either +2 or -2 for a roll of 11 (flip a coin), either +4 or -4 for a roll of 12, etc.

If using -10 for No Mana and +10 for Very High Mana, I'd probably be more inclined to have it be Normal for 10 or 11, and +1 per deviation (probably - below 10, + above 11). That appears to only allow for a range of +7, but I'd have 3's, 4's, 17's, and 18's "explode" - a roll of 17 is +6, and you reroll and add the result of that roll to the +6 (alternatively, to make NMZ's and Very High Mana more rare, only have 3's and 18's explode). Note an explosion can either have no effect or make the effect more pronounced, it can't suppress it (so if you roll a 3 - for -7 - and then roll a 15 - for +5 - you actually just stay with -7), and you can't go below -10 or above +10.