Let's see what Cleon thinks about it: any quibbles?
I have a few. To begin with, the repeated mention of "sorcerer" makes it sound like it can only cast sorcerer/wizard spells, although can't it also cast other spells (cleric, druid etc) provided it meets the prereqs?
There's also a typo ("requies") and some ugly syntax in the last paragraph.
Also, I suggested increasing the casting time for spells with costly components. Speaking of which, it doesn't seem right for them to cast spells with the Good descriptor.
Finally, the original version could cast reduce the
caster level to increase the speed.
How's this?
Dance Magic (Sp): Rautyms possess a unique ability to work magic by dancing. At least two rautyms are needed to work this dance magic. One rautym acts as the focus of the magic, and the other rautyms dance around the focus rautym to generate the magic.
Dance magic can create any spell the focus rautym has seen being cast. The focal rautym can apply any metamagic feats it has to the dance magic spell, except Quicken Spell. The magic has a caster level equal to the number of rautym participating, up to a maximum of 20 plus the Hit Dice of the focus rautym; the caster level must be high enough for a sorcerer of that level to cast the chosen spell, including metamagic effects. Rautym often dance low level spells in order to reduce the casting time (see below).
Dance magic is slow, completing the dance and casting the spell takes one minute per minimum caster level that a sorcerer requires to cast the spell, minus one minute per caster level that the ruatym's effective caster level exceeds the required caster level (minimum of 1 minute or the spell's normal casting time). The rautym can reduce this time by 1 minute for every level they reduce the casting time, down to the minimum caster level for the spell. Dance magic spells do not require material or XP components, but spells with these components take longer to dance; for every 10 XP or 250 gp worth of components the spell normally requires, the dance magic takes 1 minute longer to complete.
If the focal rautym's concentration on the dance magic is broken (same procedure as interrupting a spell) the dance magic is ruined. If a dancer is interrupted, they are unable to contribute to the dance magic. Interrupted dancers reduce the effective caster level of the group, thereby increases the casting time and possibly ruining the dance magic if the caster level is reduced to less than the spell's minimum. The DC of the resulting spell is based on the Charisma of the focal rautym.
Example: a 7th level sorcerer spell has a minimum CL of 14th. 18 rautym have a caster level of 18th, 4 higher than the spell minimum, so can cast a 7th level spell in 10 minutes (14-4) at CL 18th. If they lower the spell's caster level by another 4 levels to the spell's minimum of 14th they cut another 4 minutes off the time, casting the 7th level spell in 6 minute at CL 14th.