What is the effect of casting create pit inside another create pit?

[Grayfeather]

Either same spell or two of the chain that are different. Does it extend the pit deeper, create a pit below with the original pit's floor above as the ceiling, or does this just create a duplicate pit in the same space. Assume the casting point of the second pit is at the bottom, not at its surface starting point. My desired outcome is to create a deeper pit then dispel the first instance, trapping the individual in a pit "pocket" that will timeout locking them in stone.

[LazarX]

Nothing happens. the effects don't stack. Even cast inside the pit the point of effect is still the original level of ground.

[Jiggy]

The pits are extradimensional spaces (per the spell description). If you look up extradimensional spaces, you'll see that an extradimensional space does not function while within another extradimensional space. Thus, no pit-within-a-pit. (Interestingly, it also means that you can't access the contents of your bag of holding if you're in such a pit.)

[ZZTRaider]

There's no effect.

From Create Pit...

Create Pit wrote:

You create a 10-foot-by-10-foot extra-dimensional hole with a depth of 10 feet per two caster levels (maximum 30 feet).

The hole is extradimensional. And from the rules about extradimensional spaces...

Extradimensional Spaces wrote:

A number of spells and magic items utilize extradimensional spaces, such as rope trick, a bag of holding, a handy haversack, and a portable hole. These spells and magic items create a tiny pocket space that does not exist in any dimension. Such items do not function, however, inside another extradimensional space. If placed inside such a space, they cease to function until removed from the extradimensional space. For example, if a bag of holding is brought into a rope trick, the contents of the bag of holding become inaccessible until the bag of holding is taken outside the rope trick. The only exception to this is when a bag of holding and a portable hole interact, forming a rift to the Astral Plane, as noted in their descriptions.

So, you cannot create another extradimensional space (like from Create Pit) inside an existing extradimensional space (again, like Create Pit).

Edit: Ninja'ed by Jiggy since I stopped to pull up references. Oh well =P

[mplindustries]

Grayfeather wrote:

My desired outcome is to create a deeper pit then dispel the first instance, trapping the individual in a pit "pocket" that will timeout locking them in stone.

Here is a translation:

"My desired goal is to use a low level spell to instant win against almost any foe."

Here's the trick--if you step back, read what you wrote, and it comes out as something along those lines, the answer is going to be no--and if it's not, it should be.