The Benders
Waterbenders: I can bend plants and blood
Earthbenders: I can bend metal and sense things using my feet
Firebenders: I can create and redirect lightening
Airbenders: MARBLE
Airbenders: TRICK
Airbenders: ...Oh and I also have these boring skills like crushing a person's lungs and bones with varying levels of air pressure, amplifying sound waves/volume, extreme speed, wind that can cut, air bullets... but LOOK. MARBLES.