Abjurer (Specialist Mage)

A wizard who specializes in protective magics.

School affinity

• School: Abjuration.
• Opposed school: Alteration — Abjurers cannot learn Alteration spells.

Specialist bonus

• One additional spell of each spell level memorisable per day (once that spell level is reachable).
• +1 to saving throws vs. Abjuration-school spells (in some variants of the rules).

When to pick it

• A defensive specialist — strong with Globe of Invulnerability, Minor Globe, Protection from spells.
• Losing Alteration removes some core utilities like Polymorph Self, Stoneskin, and Improved Haste — a steep trade.

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Source: bgee/original_manuals/baldurs_gate_1_ee_mastering_melee_and_magic.pdf — "Specialist Mages (Mage Kits)" → Abjurer.