Ectoplasmic Armor

Libris Mortis: The Book of Undead (LM)Updated Supplementals (3.5)

Ectoplasmic Armor is a D&D 3.5 spell (Abjuration) from LM. On class lists for Sorcerer (Level 1), Wizard (Level 1), Spellthief (Level 1), and others. Range or area: Personal; Saving throw: None (harmless); Duration: 1 hour/level (D); Casting time: 1 standard action.

School
Abjuration
Casting Time
1 standard action
Components
V
Range
Personal
Target
The caster
Duration
1 hour/level (D)
Saving Throw
None (harmless)
Spell Resistance
No (harmless)

You gain a +5 armor bonus to AC, with an additional +1 to the bonus for every four caster levels you have (maximum +9 bonus at 16th level).
This armor bonus applies only against incorporeal touch attacks.
All other attacks ignore the armor bonus from ectoplasmic armor.