Shard O'Glase said:
Ah, so the feat only works on a small list of save or die spells, and some beneficial spells, and actually doesn't work for any damaging spells. Or am I missing the one damaging spell with one target, that isn't touch or a ray. And they just put that line in about 1/2 the dice of damage for giggles.
I think way too many people are reading the letter of the law here and ignoring the intent.
I'm with Shard (and I am typically a big letter of the law rules guy).
If the spell allows in any way, shape, or form (e.g. Dispel Magic) targeting a single target and it is not a touch spell, then you can chain it.
I'm also of the opinion that like the Empower Spell feat, any variable portion of the spell, not just damage, should be halved when it arcs. Even for spells like Enervation. But, I can see where YMMV on this. But to me, damage is damage, regardless of whether it is just hit point damage. Also, I do not think this feat should Mass Cure equally.
This is not a Mass feat, nor an Area Effect feat, it is a Chain feat.
The intent is to harm an opponent and then harm his friends a little less: just like Chain Lightning.
So, ray spells are eligible. Ranged Touch spells are eligible. And, any spell which can target a single creature, even if it can also be cast differently to target multiple creatures (such as Magic Missile or Flame Arrow) are eligible.
Otherwise, you might as well throw this feat onto the next to worthless heap with Toughness.