Shield(Player's Handbook v.3.5, p. 278)
Level: Sorcerer 1, Wizard 1, Knight of the Weave 1, Wu Jen 1, Sha'ir 1, Death Master 1, Savant 1 (Arcane),
Components: V, S,
Casting Time: 1 standard action
Duration: 1 min./level (D)
Shield creates an invisible, tower shield-sized mobile disk of force that hovers in front of you.
It negates magic missile attacks directed at you.
The disk also provides a +4 shield bonus to AC.
This bonus applies against incorporeal touch attacks, since it is a force effect.
The shield has no armor check penalty or arcane spell failure chance.
Unlike with a normal tower shield, you can't use the shield spell for cover.