Shadow Step

Dash in a line, dealing damage along the way. After a short delay a gloom clone will dash from your initial position to you, dealing damage to enemies it passes through.
Level 1: Using Shadow Step increases Ability Power by 10% for 6 seconds. Dashing through an ally will grant them this effect as well.
Level 2: The followup clone has 50% piercing.
Level 3: Increases the damage of the followup attack by 15%.