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Mirror Image
Spell Information
Spell level : Innate level: 2, Bard: 2, Sorcerer/Wizard: 2
School : Illusion
Descriptor(s) : Figment
Components : Verbal and Somatic
Range : Personal
Target/Area : Caster
Duration : 1 min. * cLevel
10 Rounds(cLevel).
Save : None
Spell resistance : No




Description

You create 1d4 illusory images of yourself, plus one image per 3 caster levels (maximum 8 images total). Enemies cannot distinguish between the real you and your doubles, and will randomly choose a target from amongst you and your doubles. Images have an AC of 10 + your Dex modifier, and a successful attack against an image causes it to disappear.

Notes

  • This spell uses EffectAbsorbDamage, yet appears to work differently than expected. See the talk page for details.
  • Only one casting of this spell can affect the caster at once.
  • Since effects are reloaded (ignoring how they were applied) when the caster changes area/a save is loaded, the balls spinning around them determining how many images are left all merge together. This could be fixed by having additional spell effect files specifically starting the balls always X apart, and the script changed to keep this in mind.
  • It is a useful spell to have in a Wand, Scroll or Rod since it doesn't use the casters ability modifier at all, and is solely based on the caster level.
  • EffectAbsorbDamage is used separately for each image, essentially creating 1-8 separate effects on the target. Images are automatically spaced out. The ghostly effect is also applied with each image; when casted, there are 1 to 8, which means that spell is really "over" after it is removed correctly.
  • Concealment checks are done prior to AC checks, so an attacker will have to bypass concealment before the test against mirror image is made. This spell is of great use for a caster that has a high AC.

Custom content notes

  • Script: nw_s0_mirrorimg

Empirical Speculation

Server-side testing has shown the following on how mirror image works:
Natural 20s, if they exceed the target's AC, hit.
Natural 20s, if they do NOT exceed the target's AC, hit a mirror image

Furthermore, the weapon that's being used matters. With both exceeding enemy AC substantially,
A weapon with crit range 20 (i.e: unarmed) will miss on a roll of 19 (unknown if soaked, or true miss)
A weapon with crit range 15-20 (i.e: keen rapier) will hit on a roll of 16, piercing past mirror images. It is uncertain if confirming threat is required.

External resources