Mortal Terror is a 23rd level cleric Encounter prayer that was introduced in Divine Power.
You smash your foe and overwhelm it with fear of imminent death.
Encounter ✦ divine, fear, weapon
Standard Action
Melee weapon
Target: One creature
Attack: Strength vs. AC
Hit: 3[W] + Strength modifier damage, and the target moves its speed away from you, taking the safest path possible.