Mana Shield is a protection spell that allows your Mana to drain instead of your health while enemies hit you. In Diablo I at least, no matter how many times you trained the spell, it would still consume 33 mana per use. Regardless of spell level, all damage taken is cut down to 2/3 of normal damage, giving a Sorcerer's Mana a better 'effective Life pool' than + Life bonuses ever will. The effect is dispelled whenever the player enters a stairwell or a portal, or when their mana runs out (even if you use a mana potion afterwards, the effect will have already disappeared).
A Sorcerer's repertoire of spells always includes Mana Shield; without it, they are too frail to be of any good against the minions of Hell.
- Books - spell level +1
- Shrines - a Magical Shrine casts Mana Shield on the player, free of Mana costs.