PDA

View Full Version : Planar Binding, Magic Circle, and Dimensional Anchor



Oblivionsmurf
2018-11-11, 07:10 AM
Some posters may have seen this (http://www.giantitp.com/forums/showthread.php?573043-Planar-Binding-is-SLAVERY) thread, where there is a spirited discussion about what the Planar Binding line of spells allows a caster to accomplish. That thread has gotten me thinking more about the Planar Binding line of spells, and how they mechanically operate.

As everyone knows, the safest and best way to use any Planar Binding spell is to:


prepare a relevant Magic Circle spell;

draw a calling diagram as part of the Magic Circle spell;

cast Dimensional Anchor on the Magic Circle;

after the above steps, use a Planar Binding spell to call a creature.

Based on my review of the spells, I am concerned that it is not mechanically possible to perform all these steps prior to using a Planar Binding spell to call a creature.

The text of Lesser Planar Binding provides:

Casting this spell attempts a dangerous act: to lure a creature from another plane to a specifically prepared trap, which must lie within the spell’s range. The called creature is held in the trap until it agrees to perform one service in return for its freedom.

To create the trap, you must use a magic circle spell, focused inward. The kind of creature to be bound must be known and stated. If you wish to call a specific individual, you must use that individual’s proper name in casting the spell.

The target creature is allowed a Will saving throw. If the saving throw succeeds, the creature resists the spell. If the saving throw fails, the creature is immediately drawn to the trap (spell resistance does not keep it from being called). The creature can escape from the trap with by successfully pitting its spell resistance against your caster level check, by dimensional travel, or with a successful Charisma check (DC 15 + 1/2 your caster level + your Cha modifier). It can try each method once per day. If it breaks loose, it can flee or attack you. A dimensional anchor cast on the creature prevents its escape via dimensional travel. You can also employ a calling diagram (see magic circle against evil, page 246) to make the trap more secure.

If the creature does not break free of the trap, you can keep it bound for as long as you dare. You can attempt to compel the creature to perform a service by describing the service and perhaps offering some sort of reward. You make a Charisma check opposed by the creature’s Charisma check. The DM assigns your check a bonus of +0 to +6 based on the nature of the service and the reward. If the creature wins the opposed check, it refuses service. New offers, bribes, and the like can be made or the old ones reoffered every 24 hours. This process can be repeated until the creature promises to serve, until it breaks free, or until you decide to get rid of it by means of some other spell. Impossible demands or unreasonable commands are never agreed to. If you roll a 1 on the Charisma check, the creature breaks free of the binding and can escape or attack you.

Once the requested service is completed, the creature need only so inform you to be instantly sent back whence it came. The creature might later seek revenge. If you assign some open-ended task that the creature cannot complete though its own actions (such as “Wait here” or “Defend this area against attack”), the spell remains in effect for a maximum of one day per caster level, and the creature gains an immediate chance to break free. Note that a clever recipient can subvert some instructions.

When you use a calling spell to call an air, chaotic, earth, evil, fire, good, lawful, or water creature, it is a spell of that type. For example, lesser planar binding is a water spell when you cast it to call a water elemental.

That is, you must first prepare a Magic Circle spell, focused inward.

The text of Magic Circle against Evil provides:

All creatures within the area gain the effects of a protection from evil spell, and no nongood summoned creatures can enter the area either. You must overcome a creature’s spell resistance in order to keep it at bay (as in the third function of protection from evil), but the deflection and resistance bonuses and the protection from mental control apply regardless of enemies’ spell resistance.

This spell has an alternative version that you may choose when casting it. A magic circle against evil can be focused inward rather than outward. When focused inward, the spell binds a nongood called creature (such as those called by the lesser planar binding, planar binding, and greater planar binding spells) for a maximum of 24 hours per caster level, provided that you cast the spell that calls the creature within 1 round of casting the magic circle. The creature cannot cross the circle’s boundaries. If a creature too large to fit into the spell’s area is the subject of the spell, the spell acts as a normal protection from evil spell for that creature only.

A magic circle leaves much to be desired as a trap. If the circle of powdered silver laid down in the process of spellcasting is broken, the effect immediately ends. The trapped creature can do nothing that disturbs the circle, directly or indirectly, but other creatures can. If the called creature has spell resistance, it can test the trap once a day. If you fail to overcome its spell resistance, the creature breaks free, destroying the circle. A creature capable of any form of dimensional travel (astral projection, blink, dimension door, etherealness, gate, plane shift, shadow walk, teleport, and similar abilities) can simply leave the circle through that means. You can prevent the creature’s extradimensional escape by casting a dimensional anchor spell on it, but you must cast the spell before the creature acts. If you are successful, the anchor effect lasts as long as the magic circle does. The creature cannot reach across the magic circle, but its ranged attacks (ranged weapons, spells, magical abilities, and the like) can. The creature can attack any target it can reach with its ranged attacks except for the circle itself.

You can add a special diagram (a two-dimensional bounded figure with no gaps along its circumference, augmented with various magical sigils) to make the magic circle more secure. Drawing the diagram by hand takes 10 minutes and requires a DC 20 Spellcraft check. The DM makes this check secretly. If the check fails, the diagram is ineffective. You can take 10 (see page 65) when drawing the diagram if you are under no particular time pressure to complete the task. This task also takes 10 full minutes. If time is no factor at all, and you devote 3 hours and 20 minutes to the task, you can take 20.

A successful diagram allows you to cast a dimensional anchor spell on the magic circle during the round before casting any summoning spell. The anchor holds any called creatures in the magic circle for 24 hours per caster level. A creature cannot use its spell resistance against a magic circle prepared with a diagram, and none of its abilities or attacks can cross the diagram. If the creature tries a Charisma check to break free of the trap (see the lesser planar binding spell), the DC increases by 5. The creature is immediately released if anything disturbs the diagram—even a straw laid across it. However, the creature itself cannot disturb the diagram either directly or indirectly, as noted above.

This spell is not cumulative with protection from evil and vice versa.

Arcane Material Component: A little powdered silver with which you trace a 3-footdiameter circle on the floor (or ground) around the creature to be warded.

(Emphasis added)


The effect of the above is:


you must call your creature using a Planar Binding spell within one round of casting your Magic Circle spell;

you cannot draw your calling diagram in this time (because it will take at minimum 10 minutes);

you cannot cast Dimensional Anchor until your calling diagram has been completed.


So, help me understand. Unless I have missed something obvious, all creatures will gain an opportunity to test their spell resistance against the Magic Circle at least once (because your calling diagram will not be prepared before this time). Any creatures with an extradimensional means of escape will always be able to use that means (because the calling diagram will never be ready before this time).

The only partial solution that I can see is that:


you draw a Magic Circle, call the creature as normal, and then have an ally immediately cast Dimensional Anchor directly on the creature (hoping that the creature's does not resist the spell);

the creature has one attempt to escape using its spell resistance (while you prepare the calling diagram);

you then draw the calling diagram, and cast Dimensional Anchor on that diagram as per normal.



This is obviously less than ideal, but better than only having a bare Magic Circle in place.

EDIT:

The description of Magic Circle also provides:

A successful diagram allows you to cast a dimensional anchor spell on the magic circle during the round before casting any summoning spell. The anchor holds any called creatures in the magic circle for 24 hours per caster level. A creature cannot use its spell resistance against a magic circle prepared with a diagram, and none of its abilities or attacks can cross the diagram. If the creature tries a Charisma check to break free of the trap (see the lesser planar binding spell), the DC increases by 5. The creature is immediately released if anything disturbs the diagram—even a straw laid across it. However, the creature itself cannot disturb the diagram either directly or indirectly, as noted above.

So, does this mean that using a calling diagram somehow increases the time in which you have to call a creature using Planar Binding?

Jack_Simth
2018-11-11, 07:48 AM
Magic Circle, especially using the trap option, has a really long duration. You cast it first (or as part of drawing the diagram, unclear on that aspect, but meh), not as part of casting Planar Binding:

You draw the diagram.
You cast the Magic Circle.
You cast the Dimensional Anchor.
You cast Planar Binding.

Oblivionsmurf
2018-11-11, 07:54 AM
Magic Circle, especially using the trap option, has a really long duration. You cast it first (or as part of drawing the diagram, unclear on that aspect, but meh), not as part of casting Planar Binding:

You draw the diagram.
You cast the Magic Circle.
You cast the Dimensional Anchor.
You cast Planar Binding.

My concern is that the wording of Magic Circle does not allow you to follow that path, you must use Planar Binding within one round of casting Magic Circle (per the text of Magic Circle). See though my edit regarding the diagram.

Bronk
2018-11-11, 08:14 AM
The effect of the above is:


you must call your creature using a Planar Binding spell within one round of casting your Magic Circle spell;

you cannot draw your calling diagram in this time (because it will take at minimum 10 minutes);

you cannot cast Dimensional Anchor until your calling diagram has been completed.



I think these are the relevant parts from your quotes above to resolve your concerns:

First, this line by itself allows you to cast 'dimensional anchor' before casting 'planar binding', because it's a flat statement of the spell effect:


A successful diagram allows you to cast a dimensional anchor spell on the magic circle during the round before casting any summoning spell.

This following line is why it makes sense in context:


A creature cannot use its spell resistance against a magic circle prepared with a diagram

Normally, the spell just requires a little circle of powdered silver to be laid down (and not even that for divine casters), but the spell allows you to further prepare the circle with a diagram. It's not specified if this happens before casting the magic circle spell, or extends the casting itself, but either way, everything having to do with the diagrams is completed by the time the 'magic circle' spellcasting has finished, and before casting any further spells.