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I'm not necessarily requiring the scrying spell (because it is limited to the plane you're on), but is it possible to get a similar effect of seeing/hearing through a sensor/creature/something else on another plane?

The goal is to send a creature to the Nine Hells and verify what's on the other side without risking the life of a humanoid.

I am looking for solutions that are standard options in the rulebooks and not requesting homebrew or houserule solutions.

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  • \$\begingroup\$ Is a chance of failure OK, or does it need to be a lead pipe cinch? \$\endgroup\$ – KorvinStarmast Jun 6 '18 at 15:20
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    \$\begingroup\$ @KorvinStarmast I'll take a chance of failure, but I'd prefer a lead pipe cinch :) \$\endgroup\$ – NautArch Jun 6 '18 at 15:22
  • \$\begingroup\$ @KorvinStarmast TO keep this more useful to the stack, i'd keep it generic. But personally, it's to go to the Nine Hells. But not a reskinned magic item. It's gotta be RAW (guess i'll add the tag ;). \$\endgroup\$ – NautArch Jun 6 '18 at 15:33
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    \$\begingroup\$ @NautArch: You should ask about the problem you have, rather than asking a broader question that might not end up getting an answer the question you actually want answered. If someone else wants a broader answer, they can ask the broader question themselves... Otherwise, you might end up having to ask the more specific question yourself as a separate question. (Related: What is the XY problem?) \$\endgroup\$ – V2Blast Jun 6 '18 at 15:59
  • \$\begingroup\$ @v2blast edited \$\endgroup\$ – NautArch Jun 6 '18 at 16:16
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Literally See a Place in Another Plane

Casing beast sense on a familiar or other willing beast and sending it to the target plane would allow the caster to perceive the destination in another plane.

Get Information About a Place in Another Plane

Ask a Planar Ally

Negotiating with a creature to act as a spy via planar ally is a viable option. The spell description explicitly lists "spy on our enemies" as something that one might request.

Sending on an Intelligent Familiar or Ally

Having a familiar go to the plane and then cast sending on it is a method to get some information about the destination without risking a humanoid.

You can send the message across any distance and even to other planes of existence, but if the target is on a different plane than you, there is a percent chance that the message doesn’t arrive. (PHB, Sending spell; description)

Ask a Deity

If the information your seeking is sufficiently specific that it can be obtained with a yes or no answer, using commune to ask your divine power may work.

Contact Other Plane

Another ask an extra planar entity could potentially obtain the information by means of the contact other plane spell.

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    \$\begingroup\$ How does one communicate with this Planar Ally once it's on a different plane? \$\endgroup\$ – NautArch Jun 6 '18 at 15:53
  • \$\begingroup\$ @NautArch ostensibly the caster would petition for assistance that has some capability for that. I would expect a number of celestial or devils have such capability. \$\endgroup\$ – GcL Jun 6 '18 at 15:58
  • \$\begingroup\$ The sending stones is a great idea! \$\endgroup\$ – NautArch Jun 6 '18 at 15:59
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    \$\begingroup\$ The question has been edited to be more specific; you should make sure the answer still fits, and potentially edit it to be more specific as well. \$\endgroup\$ – V2Blast Jun 6 '18 at 16:20
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This only meets part of your requirements, since it does put a humanoid in the line of fire (though it doesn't have to be a friendly humanoid).

It's maybe not RAI, but a Warlock with the Gaze of Two Minds Eldritch Invocation can see through the eyes of a creature on another plane for a single round.

You can use your action to touch a willing humanoid and perceive through its senses until the end of your next turn.

The restriction on seeing across planes is only on the renewal clause:

As long as the creature is on the same plane of existence as you, you can use your action on subsequent turns to maintain this connection...

You have to do the following:

  1. Gaze through the eyes of a humanoid on your turn
  2. Send the humanoid to the plane of your choosing using Gate or whatever on their turn.
  3. See through their eyes until your next turn.

You can get a little more out of this by using a Fighter as the humanoid you are looking through, and having them Action Surge to get an action on the far side of the portal.

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  • \$\begingroup\$ I'd prefer if a humanoid wasn't sacrificed. As they may not be able to get back, or the destination is bad news bears, a suicide mission isn't quite what I'm hoping for. I've added that requirement to the question. \$\endgroup\$ – NautArch Jun 6 '18 at 15:29
  • \$\begingroup\$ I'll see what I can come up with. Is there a type of creature that would be an acceptable loss? \$\endgroup\$ – A Very Large Bear Jun 6 '18 at 15:30
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    \$\begingroup\$ Possibly a Beast or Undead. Leaning more heavily towards Undead. \$\endgroup\$ – NautArch Jun 6 '18 at 15:32
  • \$\begingroup\$ So using a 'disposable' humanoid like a kobold or goblin is out? \$\endgroup\$ – A Very Large Bear Jun 6 '18 at 15:35
  • \$\begingroup\$ Ouch! Yeah, I think so. Don't really have disposable humanoids where we are right now. And not sure a disposable humanoid would accept this job, either. \$\endgroup\$ – NautArch Jun 6 '18 at 15:39

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