The lore text on Succubi / Incubi states the following (MM, p. 284; emphasis mine):

A mortal bequeaths its soul to the fiend not by formal pledge or contract. Instead, when a succubus or incubus has corrupted a creature completely — some say by causing the victim to commit the three betrayals of thought, word, and deed — the victim's soul belongs to the fiend. The more virtuous the fiend's prey, the longer the corruption takes, but the more rewarding the downfall. After successfully corrupting a victim, the succubus or incubus kills it, and the tainted soul descends into the Lower Planes.

How should this sentence be interpreted? Is the victim's soul converted into a low-level devil, demon, or another succubus/incubus? Does it get consumed by some fiend like a midnight snack?

And if none of the above are the case, what does happen to it?

I don't think D&D 5e answers this question, so I'm open to other-edition-based answers as well. I'm mainly looking for official lore information based on the Forgotten Realms setting.


2 Answers 2


The Monster Manual answers this, explaining what you turn into based on where your soul goes. Being killed by a succubus doesn't change your destination, it's the fact that you have an evil soul that drags you down.

When the soul of an evil mortal sinks into the Nine Hells, it takes on the physical form of a wretched lemure. (p67)

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If you wish to become a low level devil or other being, you may need a promotion.

Archdevils and greater devils have the power to promote lemures to lesser devils. Archdevils can promote lesser devils to greater devils, and Asmodeus alone can promote a greater devil to archdevil status. This diabolic promotion invokes a brief, painful transformation, with the devil's memories passing intact from one form to the next.

So, simply be useful, and you may be promoted up from being a gooey, clay mess.

Alternatively, if you go to the abyss, you may be turned into a Mane.

Spawn of Chaos. The Abyss creates demons as extensions of itself, spontaneously forming fiends out of filth and carnage. Some are unique monstrosities, while others represent uniform strains virtually identical to each other. Other demons (such as manes) are created from mortal souls shunned or cursed by the gods, or which are otherwise trapped in the Abyss. (p50)

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Your form here is elevated by how much blood you spill, and whether others promote you.

If instead you go to Hades, you become a larva.

The layers of Hades are called the Three Glooms — places without joy, hope, or passion. A gray land with an ashen sky, Hades is the destination of many souls that are unclaimed by the gods of the Upper Planes or the fiendish rulers of the Lower Planes. These souls become larvae and spend eternity in this place that lacks a sun, a moon, stars, or seasons. Leaching away color and emotion, this gloom is more than most visitors can stand.(p63, DMG)

While in Acheron, you fight endlessly.

Acheron has four layers, each made of enormous iron cubes floating in an airy void. Sometimes the cubes collide. Echoes of past collisions linger throughout the plane, mingling with the sounds of armies colliding. That's the nature of Acheron: strife and war, as the spirits of fallen soldiers join in endless battle against orcs devoted to Gruumsh, goblinoids loyal to Maglubiyet, and legions assembled by other warmongering gods. (p66 DMG)

  • \$\begingroup\$ so, regardless of whether you die as an inherently evil person or because you were corrupted by a Succubus, the same thing happens? And do either events have any influence on whether or not you can be revived by spells like Raise Dead? \$\endgroup\$ Commented Sep 3, 2018 at 6:44
  • \$\begingroup\$ Yes. A succubus simply makes you evil, they don't directly influence where you go. If your soul is bound into a lemure or such, it is no longer free and as such is not subject to resurrection, no. \$\endgroup\$
    – Nepene Nep
    Commented Sep 3, 2018 at 13:03
  • 1
    \$\begingroup\$ I'd dispute the point about not being free to return; I don't recall it ever being stated that lemures, manes, larvae and the like are bound there - the souls head there because that's their appropriate afterlife, and they take those forms because that's the form that newly-arrived souls take, but nothing says they're stuck there. Whether or not someone could be called back from that state by a spell like resurrection is probably something for the DM to decide. I'd rule that it depends how you got there, and whether that particular god is willing to let you leave. \$\endgroup\$ Commented Sep 3, 2018 at 13:23

A full treatment of the subject is given in the Monster Manual sections on demons, devils, and yugoloths, the Dungeon Master's Guide, and Mordenkainen's Tome of Foes. To give the briefest of summaries, it depends to which plane the soul descends. Souls are used as currency in the Nine Hells. Souls become demons in the Abyss. Souls are trapped for eternity in Carcel. There are 5 or 7 lower planes, depending on how far up the sides of the wheel you count, and each can have a different fate for souls, though they're not all purely unique.

  • 2
    \$\begingroup\$ Good answer - I think it could also use an explicit statement of "the same thing that happens to any other evil soul after they die", since the querent seems to think being killed by a succubus is somehow different. \$\endgroup\$
    – Miniman
    Commented Sep 2, 2018 at 23:43

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