Robe of the Apostle (Tirr Supplement)
From D&D Wiki
The Robe of the Apostle: This white, golden-hemmed garment, when worn by a character of the good alignment, grants the following powers:
- Spell resistance 5. (Does not stack with pre-existing resistance bonuses.)
If an evil character tries to don the robe, he/she receives two negative levels, which remain for the duration the robe is worn.