Which critters are Immune to fire?

[Particle_Man]

I assume fire elementals and fire breathing dragons are. Anything else?

Also is there any way to overcome the immunity and burn it anyhow?:smallbiggrin:

[Man_Over_Game]

Elemental Adept can help you bypass resistance, but not immunity. The Pyromancer Sorcery Bloodline in the Kaladesh article has options to bypass immunity to fire at level 18, however it is not official, and considering the unofficial Phoenix Bloodline came out afterwards, and Ravnica was officially released, I doubt the Pyromancer will be released officially.

As for which creatures are immune, here is a great article on the resistances and weakness of creatures for various elements: https://rpg.stackexchange.com/questions/103213/what-are-the-most-and-least-resisted-damage-types/103262#103262

Here's a quote of most of the relevant information:


Dragons contribute disproportionately to immunities for acid, cold, fire, lightning. That's because dragons generally come in good/evil pairs, and each dragon has 4 stat blocks (wyrmling, young, adult, ancient). So 8/10 lightning immunities are just different ages of blue and bronze dragons. On top of that metallic dragons are good - and thus unlikely to be fought - so in practice there's only 3 monsters with lightning immunities worth considering.

Among elementals, fire elementals contribute disproportionately to non-poison immunities: there's 9 kinds of fire elementals, and they're all immune to fire damage. Other than those, only Ice Mephits (cold) and Djinni (lightning, thunder) contribute immunities.

Fiends contribute a large amount of resistances and immunities to fire, cold, and to a lesser extent lightning. There's 11 devils, 13 demons and 4 yugoloths in the Monster Manual.
•11/11 devils are immune to fire and resistant to cold (presumably so they can survive in the hot and cold layers of the Nine Hells).
•12/13 demons are resistant to fire (the last one is immune)
•11/13 are resistant to cold (the last two are immune)
•13/13 resist lightning.
•4/4 yugoloths resist cold, fire, and lightning
•Night hags are resistant to cold and fire
•Hell hounds and nightmares are immune to fire

There's 6 kinds of Slaadi and they're all resistant to acid, cold, fire, lightning, and thunder. This makes sense, since they come from the chaotic plane of Limbo.

Incorporeal creatures (banshees, ghosts, poltergeists, shadows, shadow demons, specters, will-o'-wisps and wraiths) also resist acid, cold, fire, lightning, and thunder (along with non-magical weapon damage). A few of them are immune to cold rather than resistant. All except the shadow demon (which is still resistant) are immune to necrotic damage, and both shadow monsters are the only ones vulnerable to radiant.

[GlenSmash!]

It looks like there are about 40 MM monsters with fire immunity, but I haven't seen a nice table that will let me know which ones easily.

[Particle_Man]

Wow, thanks! Looks like lightning might be a better bet.

[Corran]

How does making a creature vulnerable to a damage type interact with the creature's damage immunities, if at all?

[Man_Over_Game]

How does making a creature vulnerable to a damage type interact with the creature's damage immunities, if at all?

The Vulnerability doubles the damage dealt.

Immunity makes the damage dealt 0.

So immunity would win every time.

[Particle_Man]

Well two times zero is still zero. But if the immunity is overcome somehow the vulnerability would become relevant.

[Ganymede]

How does making a creature vulnerable to a damage type interact with the creature's damage immunities, if at all?

Well you apply resistance and vulnerability after all other modifiers. So you reduce damage to 0 because of the immunity, then you double it to 0 because of the vulnerability.