Striking your foe, you call an ally to your side to attack the same target.

Encounter   ✦     Arcane, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Charisma vs. AC

Hit: 1[W] + Charisma modifier damage.

Effect: As a free action, an ally within 5 squares of you can shift 3 squares and make a basic attack against the target with a bonus to the attack roll and the damage roll equal to your Constitution modifier.

Published in Player's Handbook 2, page(s) 81.