Hit: "2[W] + Strength modifier damage, and one ally within 5 squares of you can shift 1 square as a free action." Tactical Presence: "The number of allies who can shift equals your Intelligence modifier."[PH:147][Dr397:20]
Steel monsoon is an encounter power available to warlords at 3rd level.
The "Class Compendium: Warlord" article in Dragon 397 changed the shift effect of steel monsoon to require a free action.