First, a quote from the rules:
Spell Mastery
You have mastered a small handful of spells, and can prepare these spells without referencing your spellbooks at all.
Prerequisite: 1st-level wizard
Benefit: Each time you take this feat, choose a number of spells that you already know equal to your Intelligence modifier. From that point on, you can prepare these spells without referring to a spellbook.
Normal: Without this feat, you must use a spellbook to prepare all your spells, except read magic.
As you see effect of the feat is dependent on the character's Intelligence. Now, if the character's Intelligence changes by increasing the ability score when leveling up or using an Intelligence-boosting item, does the character retroactively get additional choices? Considering that changes to Intelligence retroactively affect skill points in the Pathfinder RPG, this could actually be the case
What do you think?
I would think yes. everything else is retroactive- why not this?
Sekret_One is correct:
Permanent Bonuses
Ability bonuses with a duration greater than 1 day actually increase the relevant ability score after 24 hours. . This might cause you to gain skill points, hit points, and other bonuses. These bonuses should be noted separately in case they are removed.
All things are increased after 24 hours.
I would argue that the feat is neither a skill nor a statistic because one could get +2 from item, after 24 hours get 1 spell, then take it off, put it back on and choose another spell. This was the reason those items got an exception and had the skill fixed.
However I would houserule a retroactive effect but fix the spell, so the second time he would have to memorize the same spell.
sadly i doubt it. but it could easily go either way. get a ruling from your GM
Well actually this is not about a character, but about the implementation of the Spell Mastery feat in PCGen.