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. A few of them are immune to cold rather than resistant. 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). This makes sense, since they come from the chaotic plane of Limbo. There's 6 kinds of Slaadi and they're all resistant to acid, cold, fire, lightning, and thunder. Hell hounds and nightmares are immune to fire.Night hags are resistant to cold and fire.4/4 yugoloths resist cold, fire, and lightning.11/13 are resistant to cold (the last two are immune).12/13 demons are resistant to fire (the last one is immune).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).There's 11 devils, 13 demons and 4 yugoloths in the Monster Manual.
Other than those, only Ice Mephits (cold) and Djinni (lightning, thunder) contribute immunities.įiends contribute a large amount of resistances and immunities to fire, cold, and to a lesser extent lightning. 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.Īmong elementals, fire elementals contribute disproportionately to non-poison immunities: there's 9 kinds of fire elementals, and they're all immune to fire damage. So 8/10 lightning immunities are just different ages of blue and bronze dragons. That's because dragons generally come in good/evil pairs, and each dragon has 4 stat blocks (wyrmling, young, adult, ancient). The forum post referenced in András's answer gives a quick overview of the the damage types but misses many important details about how those damage types are distributed.ĭragons contribute disproportionately to immunities for acid, cold, fire, lightning.