Monster: Spell Scroll Mummy

A strange mummy wanders the sandy wastes, not bound to a tomb like others of its kind. Even the burning sun seems to dim in its presence. If you choose to go near it, you notice strange symbols on its wrappings. Magic-users immediately recognize these as spell scrolls.

HD 6
AC 15 [descending AC 5]*
Atk #1 touch (1d12 + spell drain)
Mv 60' (20')
Sv 13+ (or as F6)
Al Chaos
XP 500
NA 1 (1d4)

The spell scroll mummy hungers for magic. It can smell spellbooks and spell scrolls and will hunt down and attack anyone carrying them. It will leave alone travelers that have neither and wander back into the desert, unless attacked.

If the mummy decides to advance, anyone who sees it must save vs. Paralysis or be paralysed with terror until they no longer see the mummy or the mummy attacks someone.

The mummy's wrappings contain 8 spells total: three of 1st, three of 2nd, and two of 3rd level.

Each hit die's worth of cumulative damage the mummy takes destroys one of the scrolls. If the mummy takes fire damage, a scroll explodes, casting the inscribed spell at a random target. The scrolls are not harmed by non-physical damage such as magic missile. Clever players may find other ways to disable the mummy and retrieve the scrolls from it without destroying them.

If the mummy's attack hits a magic-user or similar spellcaster, the spellcaster loses one of their prepared spells, if any, starting from the lowest level slot available. A spell slot absorbed in this way heals the mummy for 1 HD's worth and magically scribes the spell into its wrappings.

The mummy cannot absorb divine (i.e. clerical) magic and has no interest in it.

As an undead, the mummy is immune to poison and mind-affecting spells.

* For ascending AC, I use unarmored = 11. This makes converting old material easy: AC = 20-DAC, base attack bonus = 20-THAC0. A normal human attacks at +0, and most monsters' attack bonus equals their HD.