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Message: <blockquote data-quote="The Sigil" data-source="post: 224977" data-attributes="member: 2013">Muddying the water...With all that's going on in this thread here is my simple, easy-to-follow (I hope) mathematical solution (don't worry, this kind of math is "counting" and "adding," not "calculus" or "set theory").Characters normally exist in three spatial dimensions.  For ease of use, call these dimensions 1, 2, and 3.  Physical objects, like the outside of a bag of holding, also are in dimensions 1, 2, and 3.Moving into an extra-dimensional space "shifts" a physical object by adding one to the number of his dimensions.  IOW, moving into a Mord's Mansion means the character (and his bag of holding) are now in dimensions 2, 3, and 4.  Why not shift more?  Because the "portal" itself is a flat plane (2-dimensional) and must share two dimensions with "normal" space (in this case, 2 and 3).Moving into a non-dimensional space shifts you "down" by one dimension.  IOW, under normal circumstances, the inside of a bag of holding exists in dimensions 0, 1, 2.  Again, it shares 2 dimensions with "normal space" because there is a 2-dimensional plane in which you can reach into it (the mouth of the bag).Non-dimensional space cannot "shift" extra-dimensional space and vice-versa.Now, what happens when you move into an extra-dimensional space and try to open a bag of holding?  The bag itself is in dimensions 2, 3, and 4 thanks to the shift when you went into extra-dimensional space.  However, the non-dimensional space did NOT shift with you.  This means that while the outside of the bag is in dimensions 2, 3, and 4, the inside of the bag is in dimensions 0, 1, and 2.  They are still connected, but only at a single point - too small to get anything out of.  Therefore, you have not "lost contact" with the non-dimensional space entirely, but you have no way to access the interior.Now, we get to the question of "what happens when we start double-shifting?"Suppose we have an extradimensional space in an extradimensional space.  Okay, fine, just shift again... we now move to dimensions 3, 4, and 5.  However, the inside of the bag of holding you brought with you remains in dimensions 0, 1, and 2.  There are now no common dimensions... you have "severed" the inside of the bag of holding from the outside... you may handle this in one of several ways...1.) BOOM!  The energy released as the bond is broken "blows up the universe."2.) NONMAGICAL!  The bag of holding loses its connection to the non-dimensional interior and is rendered forever non-magical.  All of its contents are forever lost, forever "out of phase" with everything else.3.) SINGULARITY!  Similar to Boom, but instead you get a black hole... consider this the creation of a Sphere of Annihilation.4.) OTHER... Rip in dimensional fabric sends you to the astral plane, outer plane, whatever.A similar situation occurs if you try to carry an extradimensional space into a double-shifted non-dimensional space.Now, the final question arises, "what about extradimensional space in extradimensional space?"  I suppose if you like, you can put a "limit" on things... A.) If you ever shift so much that you no longer have 1, 2, or 3 as a dimension, you immediately die.-OR-B.) Dimension -2,-3,-4 is the astral plane; dimension 6,7,8 is the ethereal (or vice versa).  As soon as you hit one of these dimensions (i.e., -2 or 6) you are immediately sucked into the appropriate plane.Don't know if this helps or muddies the water... I'm just going off the cuff here, but it seems like a really nifty start to something... and very reminiscent of the old D&D Immortals rules... <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=";)" title="Wink    ;)"  data-smilie="2"data-shortname=";)" />--The Sigil</blockquote>

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