Portals, those older than a century in particular, were susceptible to malfunction due to exposure to global magical catastrophes and simple wear. The portal stabilization spell made the usage of such malfunctioning portals safer to a degree. The level at which it stabilized was such that it could merely not work at all or send a person to the wrong place, but not necessarily hurt the user.
- ↑ 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.
- ↑ 2.0 2.1 Ed Greenwood, Sean K. Reynolds, Skip Williams, Rob Heinsoo (June 2001). Forgotten Realms Campaign Setting 3rd edition. (Wizards of the Coast), pp. 60–61. ISBN 0-7869-1836-5.