From OSE SRD
2nd Level Magic-User Spell
A visual illusion of the caster’s choosing manifests in a 20’ cube area. Three types of illusions may be created:
- An illusionary monster: That can be directed to attack. The monster has an Armour Class of 9  and will vanish if hit in combat.
- An illusionary attack: For example, an avalanche, a falling ceiling, a magic missile, etc. Targets who save versus spells are unaffected.
- A scene: Either changing the appearance of the affected area or creating the appearance of something new. The scene disappears if touched.
Stipulations: The following apply:
- Concentration: Is required to maintain the illusion. If the caster moves or loses concentration, the spell ends.
- Illusionary monsters or attacks: May appear to be harmful but never inflict real damage. A character who appears to die actually falls unconscious, a character turned to stone will actually be paralysed, and so on. Such effects last for 1d4 turns.
- Illusions from imagination: If the illusion is of something the caster has not personally seen, the referee should grant targets a bonus to any applicable saving throws.