<br/>The sphere has diameter 20'. It begins 10' above the level of the floor and extends to 30' high, reaching its max diameter at altitude 20'. Most of the chamber ceiling is 20' high, but there's a 15'-radius hemispherical dome in the middle which the upper half of the prismatic sphere extends into.<br/><br/>I think you could teleport inside as long as the effect didn't require line of effect or sight between the origin and destination. A prismatic wall or wall of force doesn't stop them b/c they are never going through (the line drawn between the origin and destination just happens to pass through). For example you could also scry on someone inside a prismatic sphere, or outside while you're inside. The scry and teleport spells don't go along the line between the points, they just begin at one and end at the other. For example, a giant prismatic wall or wall of force through the equatorial plane of the planet wouldn't stop teleporting between the N and S hemispheres.<br/><br/>And (as Kass thought in a previous post but your new one may reflect you're thinking otherwise, I can't tell) mage's distinction isn't the only way to destroy a sphere, there's the 7-spell combo.<br/><br/>Detect Magic (and successful Spellcraft) reveals the aura is an Unhallow (http://www.d20srd.org/srd/spells/unhallow.htm) with Dimensional Anchor (http://www.d20srd.org/srd/spells/dimensionalAnchor.htm) tied to it. The area encompassed by the aura suggests that its point of origin is in the center of the chamber horizontally (15' from the n/s walls and midway between teh doors) and 10' above the floor.<br/><br/><br/><br/><br/>p = prismatic sphere, shown at the cross section of its maximum diameter (20'), which occurs 20' above the level of the floor.<br/>(On the map, it looks like it's 25' wide since it's centered on a square.)<br/><br/><span class="bbc_font" style="font-family: courier;"><br/>                     _____________________________________<br/>                    /. . .|. . . . . . . . . . . . .|. . .\<br/>                  /. . . .|. . . . K . . A . . . . .|. . . .\<br/>                /. . . . .=. . . . . p p p . . . . . . . . . .\            <br/>              /. . . . . .=. . . . p p p p p . . . . . . . . . .\                <br/>            /. . . . . . .|. . . X p p X p p X . . .|. . . . . . .\                  <br/>          /.\. . . . . . .|________<span class="bbc_u">p p p p p</span>________|. . . . . . ./.\<br/></span>