AD&D 2nd Edition

This spell creates the illusion of any object, creature, or force, as long as it is within the boundaries of the spell’s area of effect. The illusion is visual and affects all believing creature (undead are immune) that view it. It does not create sound, smell, or temperature. Effects that depend on these senses usually fail. The illusion lasts until struck by an opponent – unless the spellcaster causes the illusion to react appropriately – or until the wizard ceases concentration upon the spell (due to desire, moving, or a successful attack that causes damage).

Saving throws for illusions are explained under “illusions” in Chapter 7: Magic and under “Adjudicating Illusions” at the beginning of Appendix 2. Creatures that disbelieve the illusion see it for what it is and add +4 to associates’ saving throws if this knowledge can be communicated effectively. Creatures believing the illusion are subject to its effects (again, as explained in Chapter 7). The illusionary effect can be moved by the caster within the limits of the area of effect. The DM has to rule on the effectiveness of this spell; detailed guidelines are outlined in Chapter 7: Magic and under “adjudication illusions” at the beginning of Appendix 2. The material component of the spell is a bit of fleece.