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Echoes in Time
Bard Attack 23

As arcane force tears into your foe, the force rends the fabric of time. For a moment, your allies can move about and attack before teleporting back to the place they now stand.

Ranged 10

Target: One creature

Attack: Charisma vs. Reflex

Hit: 3d8 + Charisma modifier force damage. Each ally within 10 squares of you, as the last action of his or her next turn, can teleport as a free action back to the space where he or she started that turn.
Virtue of Cunning: Until the start of your next turn, any ally who teleports using this power gains a power bonus to all defenses equal to your Intelligence modifier.

Echoes in Time is an encounter power available to bards at the 23rd level.[PH2:76]