Shield(Player's Handbook v.3.5, p. 278)
Level: Sorcerer 1, Bladesinger 1, Merchant Prince 1, Savant 1 (Arcane), Death Master 1, Sha'ir 1, Wu Jen 1, Knight of the Weave 1, Wizard 1, Spellthief 1,
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.