Terror is a Mental Magic spell that attempts to frighten a single enemy or enemy creation into running away. After Geneforge 1 it'susefulness is limited compared to more powerful spells such as Daze as it affects one target per cast and can cause the enemy to run into other groups, bringing more creations to the fight. Creations that are very intelligent (such as Vlish, Drayks and Drakons) are rarely able to be affected unless your Mental Magic and Spellcraft are very high. Like all mental magic spells it can only affect enemies with brains. Shades thus resist the spell.