Target: each creature in the area of effect
Attack: Intelligence vs. Reflex
Hit: "1d6 + Intelligence modifier force damage.
"Level 21: 2d6 + Intelligence modifier force damage."
The power's area is filled with sharp daggers of force. Any creature that enters the area or starts its turn there takes force damage equal to your Wisdom modifier (minimum 1). The cloud remains in place until the end of your next turn. You can dispel it earlier as a minor action."[PH:159][Dr401:52][U:12/2011]
The "Class Compendium: The Arcanist" article in Dragon 401 added the evocation and zone keywords to cloud of daggers, changing the function of the power's lingering effect. The December 2011 update finalized these changes.