Changes

===[[Teleport]] or [[Dimension Door]] spells==={{Main|Teleport|Dimension Door}}These spells (or magical devices that duplicate them) allow spellcasters to jump from one side of the sphere to the other without physically crossing the sphere.<ref name="CoAS">[[AD%26D_Adventures_in_Space#Concordance_of_Arcane_Space|''Concordance of Arcane Space'']] pages 9-10</ref>

===[[Phase Door]] spell==={{Main|Phase Door}}This spell (or a magical item that duplicates it) makes part of the crystal sphere immaterial and allows a [[spelljamming ship]] to pass through.<ref name="CoAS">[[AD%26D_Adventures_in_Space#Concordance_of_Arcane_Space|''Concordance of Arcane Space'']] pages 9-10</ref>

{{Main|Crystal sphere portal}}Most crystal spheres have natural portals that pierce the shell at various locations. These portals usually and vanish at random times and are located in random places. Looking for these portals can take a long time.<ref name="CoAS">[[AD%26D_Adventures_in_Space#Concordance_of_Arcane_Space|''Concordance of Arcane Space'']] pages 9-10</ref>

===[[Stars]]==={{Main|Stars}}In some crystal spheres, stars are located on the inside of the crystal shell. A few of these stars are themselves also natural portals through the crystal sphere. A spelljamming ship diving into the heart of the star would pass through the shell and appear in the phlogiston. However, a high number of stars are portals to the [[Plane of Radiance]] or the [[Plane of Fire]]. Flying a ship into one of those stars would be fatal.<ref name="CoAS">[[AD%26D_Adventures_in_Space#Concordance_of_Arcane_Space|''Concordance of Arcane Space'']] pages 9-10</ref>

===[[Spelljammer, The|''The Spelljammer'']] and creatures like space dragons==={{Main|The Spelljammer|List of creatures with the abilty to create crystal sphere portals}}The legendary ship, called ''The Spelljammer'', and some large space creatures, like space dragons, seem to have an innate ability to create portals similar to the natural portals. These portals close slowly over time, so ships can sometimes use them.<ref name="CoAS">[[AD%26D_Adventures_in_Space#Concordance_of_Arcane_Space|''Concordance of Arcane Space'']] pages 9-10</ref>

===The [[Create Portal]] spell==={{Main|Create Portal}}This spell duplicates the natural ability of ''The Spelljammer'' and space dragons, but the portals created by this spell have a much shorter duration. Portals created via this spell last no longer than 120 minutes.<ref name="CoAS">[[AD%26D_Adventures_in_Space#Concordance_of_Arcane_Space|''Concordance of Arcane Space'']] pages 9-10</ref>