Scourge of heaven
invoker attack 1
Target: each enemy within the area of effect
Attack: Wisdom + 2 vs. AC
Hit: "1d8 + Wisdom modifier damage."
Covenant of Malediction (fear): "The target also takes a −2 penalty to attack rolls until the end of your next turn."
Covenant of Preservation: "Each ally in the burst gains a +2 power bonus to defenses until the end of your next turn."
Scourge of heaven is an encounter power available to invokers at 1st level.
Scourge of heaven was introduced in the "Invoker Essentials" article by Robert J. Schwalb in Dragon #383.
It is rated as average only for the covenant of wrath due to damage output. It is treated as a weak choice for the other two covenants, under the general case of those two covenants being generally weaker. [Charop invoker]