Half spell damage

Half spell damage is an extrinsic property which halves any damage taken from spells, as well as halving certain other effects. This property is currently conferred only by carrying The Orb of Detection, The Platinum Yendorian Express Card, The Orb of Fate or The Eye of the Aethiopica.

The following monster spells are affected by half spell damage:

Psi bolt	Halves damage.
Stun	Halves duration.
Drain strength	Halves reduction. Magic resistance negates.
Curse items	Halves maximum number of items affected from 6 to 3; stacks with magic resistance, combined to only 2.
Open wounds	Halves damage. Stacks with magic resistance to quarter damage.
Confusion	Halves duration.
Paralyze	Halves duration.
Blind	Halves duration.
Lightning	Shock resistance negates.
Pillar of fire	Fire resistance negates.
Cold	Cold resistance negates.

The following monsters can cast spells, some of which affected by this property:

Monster	Base Level	Spells	Notes
Kobold Shaman	2
Orc Shaman	3
Gnomish Wizard	3
Barrow wight	3
Guide	5
Abbot	5	Clerical
Acolyte	5	Clerical
Apprentice	5
Golden Naga	10
Nalfeshnee	11
Lich	11
Aligned priest	12	Clerical
Demilich	14
Dark One	15
Ixoth	15
Minion of Huhetotl	16
Thoth Amon	16
Chromatic Dragon	16
Nalzok	16
Ki-rin	16
Titan	16
Master Lich	17
Archon	19
Neferet the Green	20
Arch-lich	25
Grand Master	25	Clerical
High priest	25	Clerical
Arch priest	25	Clerical
Master Kaen	25	Clerical
Wizard of Yendor	30
Orcus	30
Dispater	36
Demogorgon	50

Clerical spells include open wounds, cure self, confusion, paralyze, blind, summon insects, curse items, lightning, pillar of fire, and geyser.

Magical spells includes psi bolt, cure self, haste self, stun, disappear, drain strength, destroy armor, curse items, aggravate, summon nasties, clone, and touch of death.

It is unclear whether or not this is a complete list.

References

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