Elemental spell

Hi,
I doubt about the feat elemental spell.

The feat says :
"You may replace a spell’s NORMAL DAMAGE with that energy type or split the spell’s damage"

Can I use it on an energy spell like fireball and split the spell's damage fire/cold?

Or Is it only reserved for the spells that are not energy spells like Magic missile?

Thx

magic missile is an energy spell. force type. as a rule almost ALL damaging spells has some kind of damage type in them (only few specificly doesn't point the type to make it never resistanat. vampiric touch is one).
as for your question yes. the damage listed in the spell is changed by the metamagic feat. or half changed. so acid elemental fireball would deal only acid or half fire half acid depand on how it's cast.

You can indeed change the damage type on a fireball. Elemental Spell is actually a very good feat for an elemental sorcerer to take. You choose a different type of energy from that of your bloodline and choose most if not all your spells from the other two elements. Since your bloodline allows you to change the element of a spell to your own, this allows each spell to deal three different types of energy. So let’s say you are a water elemental sorcerer and choose fireball as one of your spell. Your fireball can do either fire or cold damage when cast as a third level spell. If you had elemental spell (electricity) it you could cast it using a 4th level slot and have it deal electrical damage.

Changing the damage of a fireball to cold or fire/cold is pretty much what the feat was designed for. You can change any damaging spell in this manner, whether the normal damage is fire, force, bludgeoning, negative energy, or even untyped.

Apologies for the thread necro, but what is the advantage to switching half of a spell's damage vs. just switching all of it? For example, if I cast a damage dealing spell, but I want to change the energy type... that's fine. I can imagine a scenario for that.

or split the spell's damage, so that half is of that energy type and half is of its normal type.

But what scenario(s) exists where I would want to leave half the spell's damage as normal, but change half of it to acid, cold, electricity, or fire?

fishing for vulnerabilites after a failed knowledge check.

But what scenario(s) exists where I would want to leave half the spell's damage as normal, but change half of it to acid, cold, electricity, or fire?

I can't imagine a common one. I suppose it's possible that the caster gets a bonus to a type, say [Cold]. Maybe they deal 1 extra point of damage per die with a [Cold] spell, or they count as 1 caster level higher (added a damage dice maybe) on [Cold] spells. But maybe they're shooting at something that has regeneration which is turned off by fire or acid, so they just make half of the damage fire, while theoretically still keeping the [Cold] descriptor and allowing them to cast it more powerfully or for more damage.

i think also when you want to clear a mass of low level mobs where some have acid resistance and some fire, and you don't want to waste two spells on them.

also also, if you want the spell to be effected by 2 out of the 3:
Chilling\Shocking\Burning amplification feats. (I never found an acid amplification feats, is there no acid version of these feats? why not?)