Clever strike
rogue attack 1
Melee weapon
Requirement: wielding a light blade
Special: If an ally is adjacent to and able to attack the target, the user has combat advantage against the target for this attack.
Target: one creature
Attack: Dexterity vs. AC
Hit: "1[W] + Dexterity modifier damage.
"Level 21: 2[W] + Dexterity modifier damage."[PHH2:MH3]
Clever strike is an at-will power available to rogues at 1st level.