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Hold the line
warlord attack 3

With a snap series of commands, you keep your allies in formation and well defended as you assault your adversary.

Target: one creature

Attack: Strength vs. AC

Hit: "1[W] + Strength modifier damage."

Effect: "Until the end of your next turn, allies gain both a +2 power bonus to AC and cannot be pulled, pushed, or slid while adjacent to you."[PH:146][Dr397:19]

Hold the line is an encounter power available to warlords at 3rd level.

Hold the Line was first introduced in the Player's Handbook.

CharOp Evaluation: Poor [Char-op Warlord]

This does poor damage, and has an effect that encourages clustering, a tactically questionable action. This might have place in very specific builds, but it's too corner-case to be useful to most Warlords.