D&D4 Wiki
Guarded attack
rogue attack 1

Requirement: wielding a light blade

Target: one creature

Attack: Dexterity vs. AC

Hit: "2[W] + Dexterity modifier damage, and if the target makes a melee attack against you before the start of your next turn, you can make a secondary attack against it as an immediate interrupt.

"Secondary Attack: Strength vs. AC

"Hit: 1[W] + Strength modifier damage, and the target takes a −2 penalty to the triggering attack roll."[MP:73]

Guarded attack is an encounter power available to rogues at 1st level.