What is the exact wording on the capstone ability (the one that lets you emulate any class feature of any class)? Is it strictly base classes, or can PrC abilities be mimicked as well? And also, is it only 1 min/day? Would save a lot of the run around of making a feasible 9's Chameleon (without using homebrew that is) if it could mimic more than just base classes.
It says "standard character class" which in the DMG and PHBII at least is synonymous with base class. So it's just base classes. With that said, because spellcasting really is extraordinary, and it works for any one ability, options like "A Fighter's Bonus Feats" and "A Sorcerer's Spellcasting" and "A Warblade's Manuevers" become quite reasonable. Wizard casting isn't, because you don't have time to memorize spells. Still, it's a PLENTY powerful ability, and if you want the effects to last a while, why not just get Shapechange (from Sorcerer casting), cast that, shapechange into a Solar, and have Cleric casting for a good long time? Feel free to cast other long duration buffs while you've still got the Sorcerer casting.
JaronK
So a factotum can use the ability *is actually a cleric* 1/day? Nifty.
I remembered someone recommended using the Knight's "does not die ability"
Also, it's an ability granted before level 15, but you're considered your factotum level for the purposes of using it. So you could get 11 bonus fighter feats. For silly-ness, make at least of of those extra action points, so you can use this ability again.
I wonder if you can use this to get ACF powers?
Spellcasting is (Ex)? Where does it say this?
nowhere, which is the point, IIRC. If it's not listed as SLA or Su, it's Ex.