Elemental Fist

When you use Elemental Strike pick one of the
following energy types: acid, cold, electricity, or
fire. On a successful hit, the attack deals damage
normally plus 1d6 points of damage of the
chosen type. You must declare that you are
using this feat before you make your attack roll
(thus a failed attack roll ruins the attempt). A
monk may attempt an Elemental Fist attack a
number of times per day equal to his monk
level, and no more than once per round.