Tallulah:
No, there is one which is only a mild DC booster for illusions and enchantments (and it involves a check) and one that lets you drop concentration and obviate masterwork instruments to cast and play.
Complete Adventurer, Lyric Spell
quote:
You can channel the power of your bardic music into your magic, allowing you to expend uses of your bardic music ability to cast spells.
Prerequisite
Perform 9 ranks, ability to spontaneously cast 2nd-level arcane spells, Bardic music,
Benefit
You can expend daily uses of your bardic music to cast any arcane spell that you know and can cast spontaneously. You must still use an action to cast the spell (following the normal rules for casting time), but using the Lyric Spell feat counts as part of the spellcasting action. Casting a spell requires one use of your bardic music ability, plus one additional use per level of the spell. For example, casting a 3rd-level spell requires four daily uses of your bardic music ability.
In an old arena and a game, I had a Bard / Lyric Thaumaturge / Sublime Chord, so I knew it wasn't only in Races of Stone.
-
Regarding versatile spellcaster:
I think the standard rules of magic and the lack of any language to the contrary clearly enough limits Versatile Spellcaster to only sacrificing two "spell slots" of a single lower level to "cast" a single known spell of a single higher level, impliedly of the same spontaneous category as the sacrificed spells. I also think we can all easily accept that despite a warmage or beguiler "knowing" all spells on their list from the beginning, the feat does not explicitly grant the ability to cast spells of a higher level than the character has normal access to.
A character can already elect to prepare or cast a lower level spell in place of a higher level spell, and versatile spellcaster is a feat that effectively enhances that ability for spontaneous spells.
Feats like Versatile Spellcaster don't necessarily need I result in insanity, but because of simplistic wording they're prone to ridiculousness, which I believe is why they are frequently banned.
I don't think we should allow feats or spells in isolated cases. We should either find a way to make them work for everyone and clearly list that in the rules or keep it banned. The feat is, after all, from a book we shouldn't even be using...