As a general rule, portals were invisible, and it was not possible to see what was on the other side of the portal. Mundane methods like sticking one's head into a portal did not work; a person who tried such a thing was immediately sent to the other side. The portal view spell made such a view possible. It made one side, the side where the caster was located, transparent, thus allowing people to see where the portal led. This spell only allowed light to pass through from the destination; it did not allow one to send a spell through the portal.
- ↑ 1.0 1.1 1.2 1.3 Bruce R. Cordell, Gwendolyn F.M. Kestrel, Jeff Quick (October 2003). Underdark. (Wizards of the Coast), p. 60. ISBN 0-7869-3053-5.
- ↑ Ed Greenwood, Sean K. Reynolds, Skip Williams, Rob Heinsoo (June 2001). Forgotten Realms Campaign Setting 3rd edition. (Wizards of the Coast), p. 59. ISBN 0-7869-1836-5.
- ↑ Bruce R. Cordell, Gwendolyn F.M. Kestrel, Jeff Quick (October 2003). Underdark. (Wizards of the Coast), p. 72. ISBN 0-7869-3053-5.