Minor Malison

This spell allows a wizard to adversely affect all the saving throws of his enemies. Opponents under the influence of this spell make all saving throws at a penalty of -1.

Alternatively, the wizard may select any one school of magic and cause his enemies to make all saving throws against magic from that school at -2. This penalty is not cumulative with a saving throw penalty derived from the wizard being a specialist; the penalty is not increased to -3.

Note from Wizard's Spell Compendium Pg 569

Notes: Uncommon spell (ToM). A specialist wizard barred from enchantment/charm spells can research a version of this spell that affects his own school, according to the general rules for spell research.