When a spellcaster announces an intention to cast a spell and the casting is interrupted, the spell is disrupted and lost. It neither takes effect, nor can it be cast again until it is re-memorized. If, however, the caster decides to attempt to maintain concentration in spite of the interruption, there is a chance that the spell may still be successfully cast, but there is a chance for a mishap. The caster must roll 1dZ depending on the nature of the interruption. If the distraction is minor (the caster is jostled, asked questions, or briefly loses sight of a target), the caster must roll a green dZ. If the distraction is major and physical (the caster is physically injured or threatened with injury), the caster must roll a yellow dZ. If the distraction is major and mental (the caster is magically or psionically attacked) or the caster fails a saving throw, the caster must roll a red dZ. The result of the roll is compared to the table below:
|brain||The spell is cast successfully.|
|footprints||The spell is disrupted and lost.|
|blast||Roll on the Spell Mishap table.|
- Stunning Blow. The spell fails and the caster is stunned for 2d12 rounds.
- Reversal. The reverse of the spell is cast. If there is no reverse version, it backfires instead.
- Backfire. If offensive, it affects the caster. If beneficial, it affects the opponent. If neither apply, then the result is concussion.
- Concussion. The spell fails and the caster is rendered unconscious for 2d12 hours.
- Memory Drain. The spell succeeds, but all memorized spells are forgotten in the effort to maintain concentration.
- Explosion. The spell fails and the uncontrolled magical energy explodes causing 1d6 hit points of damage per level of the spell to all within a 10' radius.