Hole Up

You may use this ability twice per day, and no
more than once per hour. Choose a location
or ally that is within arm's reach of your
character. For the next two turns, whenever
an opponent comes within arm's reach of the
chosen location or ally, you may make a free
attack against that opponent. Opponents who
were already within arm's reach when you
activated this ability are not affected. This
ability will terminate if a chosen ally moves
more than one arm-length away from you.