Immunities, Resistances, and High level play.

[Minigiant]

Yeah... that's a very silly way to look at it. Either let something be a damage type or don't. If a fire elemental has a sword made of fire and it swings into you (or claws, or whatever)... historically it does fire damage. If you want it to be fire and slashing, sure, whatever.

Similarly, that "firehose" of water isn't much different from a "dragon breath" of <insert anything>.

Magic missile deals force, not force + bludgeoning, or force + piercing.

Immunity to damage types gets dumb under the way they've been handled for over 30 years. If you want to redo all of the damages to address that, that's potentially interesting...

My point is not to create additional damage types.

My point is that attacking a fire elemental with fire is like shooting a human with a water gun.

Pressureless Fire will not harm a fire elemental or a creature from the hottest parts of a fire based plane.

The base attributes of most spells will not be powerful enough to be those monsters or the harshest reaches or fate based resistance.

Fireball might harm an imp but the local pit fiend lord bathes in magma. He feels fireball is more like "room temperature"ball. Then he downs the last of his cobra venom martini and spears someone through the chest.

 

[keterys]

Sure... now identify what sources of fire in dnd are pressureless?

I will say... by this qualification, I am immune to metal. Heck, I even wear the stuff around with me. I do kinda like the ring of that. I guess I lose the immunity when the metal is, say, sharp, or heavy, or otherwise used against me in a harmful fashion. But I can touch it, lie on it, wear it, etc quite harmlessly.

Now to identify the spells which use fire, as their damage type, which are not intended to harm the recipients.

 

[Minigiant]

Sure... now identify what sources of fire in dnd are pressureless?

Most of them actually. Most fire and flames in D&D are pressureless explostions or straight fires.

My point is that you can't burn a fire elemental or pit friend. You can blow them up but you can't burn them to death with mundane or normal magic fire. They aren't hot enough or the fire doesn't affect them.

If you are a pyromancer or fire priest and can weave primal fire, hellfire, or holy flames into your fire... maybe. But high level stuff are too tough to be affected by a few things.

I will say... by this qualification, I am immune to metal. Heck, I even wear the stuff around with me. I do kinda like the ring of that. I guess I lose the immunity when the metal is, say, sharp, or heavy, or otherwise used against me in a harmful fashion. But I can touch it, lie on it, wear it, etc quite harmlessly.

Now to identify the spells which use fire, as their damage type, which are not intended to harm the recipients.

Yes you cannot be metaled to death just like someone cannot feather or wet me to death. Water, metal, and feather are not harmful to humans and minigiants.

My point is not that fire isn't harmful.
My point is that fire isn't harmful to high level fire elementals and devils.