Fear is an ability that causes Boost -1 (One turn decrease of 1 attack) before attack in the battle cycle of an unit. The effect wears off at the start of the next battle cycle of the casting unit, or death of the victim unit, or death of the caster unit. As status effect towards enemy, it does not trigger reflect, cannot be blocked by physical defense, and cannot affect immune units.
Deploy: Fear is just as it says, only lasting 1 turn.
Sacrifice: Fear, will not be affected by the death of the caster, since the caster is killed on casting, only the other two criteria applies.