# Would Guardian's Counter work while flanking?

Dragon Magazine 399, under "Character Themes", introduces a power named "Guardian's Counter." This power is described as follows:

You and the ally shift up to 2 squares as a free action, swapping positions. You become the target of the triggering attack, in place of the ally. After the attack is resolved, you can make a basic attack against the attacker.

It is triggered by:

An ally within 2 squares of you is attacked and you are not included in the attack

If the allies are in a flanking position around a mob like so:

F * *
* M *
* * C


where F = fighter, M = mob, and C = cleric, can the cleric use this power to take damage in place of the fighter?

Edit: The mob being flanked did not initiate the attack. Another mob initiated the attack some squares away as a ranged attack.

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