A couple other blogs in the Network prompted me to look again at the "talent chart" I had thrown together for B/X Thief abilities. The chart is an inexact conversion of the percentile chart for success at picking pockets, hiding, etc, using the d12. The numbers improve in what I'd consider the largest acceptable level clusters (1~3, 4~6, 7~9, etc). Plus, there is enough fiddle-factor to allow modifiers from the character stats (-3 to +3 in my LL set up) and challenge difficulty (like a complex lock +2). After reading the posts at Grognardia about checks not being tied directly to stats, I thought that perhaps other classes could have a level-centric "talent chart" like the Thief. Next thing I know, I see a spell check chart for sorcery over at Ode to Black Dougal, where I made a few queries. I agree with Mr. Armstrong that there should be a "test" to avoid spell backfires and for learning/recalling arcane formulas. I think a wizard should be able to attempt more powerful spells if he is really intelligent and can risk the price of failure. All this started my look at class talents in a matrix, where abilities are "rolled out" and become easier as the player advances in experience. Below I have some quick drafts for the Fighter, Knave, and Wizard: