Campaign Design - Spells: Independent Illusion

Independent Illusion (from School of Illusion)
Illusion (Figment, True Illusion)

Level: Sorcerer/Wizard 8
Components: V, S, M
Casting Time: 1 standard action
Range: Long (400 feet + 40 feet per caster level)
Target, Effect, or Area: Visual figment that cannot extend beyond a 20-foot cube + one 10-foot cube per caster level (S)

Duration: Permanent until triggered, then 1 round per caster level

Saving Throw: Will disbelief (if interacted with)
Spell Resistance: No

This spell creates the visual illusion of an object, creature, or force, as visualized by you. You can move the image within the limits of the size of the effect. This spell’s figment activates when a specific condition occurs. The figment includes visual, auditory, olfactory, and thermal elements, including intelligible speech. The illusion possesses a tiny spark of the caster's Intelligence that lets it react to changing situations as the caster desires, as though he consciously directed its actions. Casting this spell inflicts 1 point of temporary Intelligence damage on the caster.

You set the triggering condition (which may be a special word) when casting the spell. The event that triggers the illusion can be as general or as specific and detailed as desired but must be based on an audible, tactile, olfactory, or visual trigger. The spell functions when specific conditions are fulfilled according to your command as set in the spell. Triggers react to what appears to be the case. Disguises and illusions can fool them. Normal darkness does not defeat a visual trigger, but magical darkness or invisibility does. Silent movement or magical silence defeats audible triggers. Audible triggers can be keyed to general types of noises or to a specific noise or spoken word. Actions can serve as triggers if they are visible or audible. The trigger cannot be based on some quality not normally obvious to the senses; an independent illusion cannot distinguish alignment, level, Hit Dice, or class except by external garb.

The range limit of a trigger is 15 feet per caster level, so a 16^th-level caster can command an independent illusion to respond to triggers as far as 240 feet away. Regardless of range, the mouth can respond only to visible or audible triggers and actions in line of sight or within hearing distance.

Material component: A bit of fleece and jade dust worth 100 shillings.

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