I was recently talking with a player about her Druid and how she could be more effective against swarms. We were lamenting the fact that her Earth domain ability was single target and therefore useless, since she could spam them like nuts. This brought us around to a way of changing the SLA effect to another attack style, such as short range spray or stationary puddle. I thought of a feat. Something that would allow the caster to change the attack style from dart to spray to puddle as they wished every time they manifested the ability.
So the 30' range 1d6+1/2 levels dart could be instead a 5' puddle dealing 1d4 for level/2 rounds or a 5' spray dealing 1d4+1/2 levels fan effecting 3 connecting squares adjacent to caster.
What say you all, would this be worth a feat? If so, would this be over/under powered? It looks balanced to me, but since I came up with it, I might be a tad biased. ;)
It's fine, but I wouldn't bother taking this feat. There are ways to deal with swarms that require less permanent investments.
I'd use Alchemist's Fire or Acid Flasks for swarms early on.
That would be an underpowered feat, in my opinion. I would add in maybe an additional two or so uses of the ability per day.
Unless you're not planning to get to higher levels, bear in mind that this ability will become mostly useless by mid levels.
OR, let her take the feat as is, but with the ability to re-train it later.