Wall with no doors prevents the creation of magical means of transport (both entrances and exits) in the area of effect. Within this area, summoning spells such as monster summoning (I to VII), gale, conjure elemental, and so on will not function. In addition, characters find it impossible to transport in or out via dimension door, teleport, shadow walk, plane shift, or similar spells. This ward even prevents the use of spelldoor in or out of the area of effect. Spells that create or facilitate physical means of egress-such as passwall, knock, or disintegrate-function normally.
Notes: Common in the Mystara setting; otherwise very rare.