takyris said:I'd just go with making it a 3rd level spell that can be cast as a Swift action and lasts only one round. Need to cast fireball AND invisibility? Drop this 3rd-level spell, and you can do that. Party's fighter needs to make a full attack AND a move action? Now he can. For one round.
In essence, it's a 3rd-level spell that duplicates the d20 Modern Heroic Surge.
So for the cost of a 3rd level spell, I can now emulate an ability (quicken spell) that costs a FEAT and requires a +4 spell level adjustment, meaning the weakest quicken spell is a 5th level spell (yes, I'm not including 0th level spells). And let us not forget that they allows us to cast two 9th level spells in a round, instead of the maximum 9th level followed by 5th level spell (due to quicken's +4)
I'm consuming less resources in terms of high level spell slots, I don't have to take a feat, AND I can make a fighter more powerful if I don't want to bump my spellcasting. How is that balanced?