Summon nightmare/hell hound/succubus

[Scarytincan]

Since these don't squarely fall into demon or devil, is there anything that addresses summoning these creatures?

[DMThac0]

If you go by how the spells are described, then the only way I see that you'd be able to get one is to go play in the Abyss.

Otherwise a DM may allow you to veer off the prescribed path and allow you to alter something like conjure Fey/Celestial into a conjure Fiend.

[leogobsin]

Planar Ally is able to summon any fiend, not just demons or devils, though you don't really get to control what creature that spell summons.

[Segev]

Planar Ally is able to summon any fiend, not just demons or devils, though you don't really get to control what creature that spell summons.

Not really something to do to an "ally," but planar ally into a magic circle and then whammy them with planar binding, perhaps?

[Unoriginal]

Not really something to do to an "ally," but planar ally into a magic circle and then whammy them with planar binding, perhaps?

Planar allies can leave whenever they want, so it wouldn't work.

[Segev]

Planar allies can leave whenever they want, so it wouldn't work.

Not if they're in a magic circle. (http://5e.d20srd.org/srd/spells/magicCircle.htm)


•The creature can’t willingly enter the cylinder by nonmagical means. If the creature tries to use teleportation or interplanar travel to do so, it must first succeed on a Charisma saving throw. ... and ...
When you cast this spell, you can elect to cause its magic to operate in the reverse direction, preventing a creature of the specified type from leaving the cylinder and protecting targets outside it.

Net result: they must succeed a Charisma save to use teleportation or planar travel to leave, and cannot even attempt to leave by direct physical means. (If a DM wanted to be a jerk, he could let them just keep making the save every round and keep trying until they succeeded, but that's clearly not the intent, since the idea here is that this is at least potentially a viable way to contain a creature. I suggest they get one such save, and that result applies to any repeat efforts for that particular casting.)

Thus, you could summon your planar ally into such a circle. Well, maybe. Technically, the entity sending the creature can put it in any unoccupied space within 60 feet of you, and could probably refuse your request if it felt you were being disingenuous by leaving only one such space available.

Y'know, unless it's a believer in having its minions duke it out for dominance, and sending you something to bind to your service (if you can) is amusing to it.

But yeah, the big weakness of this strategy is that, technically, you're beseeching a Great Power for aid, and it's sending you one of its servants for you to attempt to persuade. It might be displeased by you mistreating said servant. Let alone its option to place the creature anywhere it wants to within range of you.

So this is hardly a reliable or safe means of binding a critter.

[Unoriginal]

Not if they're in a magic circle. (http://5e.d20srd.org/srd/spells/magicCircle.htm)

... and ...

Net result: they must succeed a Charisma save to use teleportation or planar travel to leave, and cannot even attempt to leave by direct physical means. (If a DM wanted to be a jerk, he could let them just keep making the save every round and keep trying until they succeeded, but that's clearly not the intent, since the idea here is that this is at least potentially a viable way to contain a creature. I suggest they get one such save, and that result applies to any repeat efforts for that particular casting.)

Thus, you could summon your planar ally into such a circle. Well, maybe. Technically, the entity sending the creature can put it in any unoccupied space within 60 feet of you, and could probably refuse your request if it felt you were being disingenuous by leaving only one such space available.

Y'know, unless it's a believer in having its minions duke it out for dominance, and sending you something to bind to your service (if you can) is amusing to it.

But yeah, the big weakness of this strategy is that, technically, you're beseeching a Great Power for aid, and it's sending you one of its servants for you to attempt to persuade. It might be displeased by you mistreating said servant. Let alone its option to place the creature anywhere it wants to within range of you.

So this is hardly a reliable or safe means of binding a critter.

If you use Conjure Woodland Being to summon a Fey in a Magic Circle, but then hurt yourself and fail the Concentration save, is the Fey still stuck in the circle?

Of course not. There is a difference between planar travel (which would require a Charisma check) and the conditions for the maintaining of the summoning not being met anymore.

In the case of Planar Ally, the conditions for the summoning to be maintained are to agree on the price of the service and to uphold the payment. If not, the spell fizzle out, Magic Circle or not.

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On a separate but related subject, a funny fact about Magic Circle: it doesn't actually prevent the being in the cirlce from attacking you, it just makes it harder. Specifically, if you reverse the circle, it just impose a disadvantage to attack people outside of it.

Be sure to check if the creature has ranged attacks. Or, you know, spells that don't use attack rolls.