Meteor Fist (3.5e Invocation)

You must make an unarmed attack as part of this ignition, though you do not provoke attacks of opportunity for doing so. On a successful hit you deal your unarmed damage, 1d6 points of fire damage per caster level, and throw the opponent back 10 feet back per caster level. The enemy takes and amount of addition damage as though they had fallen the distance that they were moved. For every size catagory the enemy is larger than you, the distance throw back is reduced by 20 feet, to a minimum of 0 feet.

Those struck get a Fortitude save DC 18 + Charisma, on a successful save they are not blown back, but still take the unarmed and fire damage.