Quick unrelated note: wonderful weekend in Sioux Falls, SD. Makes me want to move there.
Okay, more on task:Chart based spellcasting. Link points to the original post about it a couple years ago.
The main issue with this chart was that the dice are very rare and there's not a really good way to fudge them. I thought about setting up a d666 table, but that's really clunky looking up a result from a list of 216 entries every time you cast a spell.
Since success for casting a spell is going to rely on looking up a result somehow, I was torn between a d66 table and a simple d20 roll.
In the spirit of get stuff done before the end of November I chose the d20 and changed how the charts work. The closest comparison I can make is that an individual chart acts like a rune, granting you access to various spells. Those spells are listed as Damage, Utility, or Protection spells. Roll a d20 for the spell to see if it is successful.
What is different from a rune-based system, though, is that two or more charts will have the same spell, but some charts grant more success than others for casting the same spell.
Once a spellcaster can make scrolls, though, they can import spells from a specific chart to generate their own chart. Yes, the idea is that they use the best chart available for the spell they desire.
Next post will have an example or two.