Most of the attacks I came up with is from an Kung Fu movie and animes. With some attacks original

Airbending

Lion's Roar-The Airbender inhales deeply until it fills his/her lungs, then the Airbender yells at his target. The exhalation along with the yell will cause powerful hurricane like winds which blows his/her opponent's way. No pun intended. Ok, so the pun is intended. The louder the yell, the more destructive the attack

Waterbending

Raining Ice Bullets Of Death-The Waterbender gathers enough water to cause a rain and throws the water in the air as hard as he/she could. As raindrops fell, the Waterbender then freezes the water into icicles which can impale the opponent like a pincushion. The Waterbender him/herself won't be hurt, as along he/she blocks/turns the ice away into water. The rain will last depends on how much the Waterbender gathered.

Ice Blade-The Waterbender gathers water and freezes it to an icicle, sharp enough to fight and cut. The usefullnes depends on the swordsmanship on the Waterbender.

Geyser-This move is for expert Waterbenders as the water comes from the ground. The Waterbender spins his/her arms around until the right momentum and shoots the water from the ground. The most experienced Waterbenders can change directions and create more geysers, as the intense water pressure crushes the opponent.

Earthbending, specifically sand

Sandstorm-The Sandbender summons a large tornado of sand, burying anyone in his/her midst.

Cresent Cutlass-The Sandbender??swings his/her arm of hardend sand in a shape of a cresent, anyone who was hit by the sand will have parts of their body dehydrated and shriveled.

Wasteland-The Sandbender's most powerful move, he/she puts his/her hands to the ground an dehydrates it to the ground. The Sandbender's victims will end up skinnier than a anorexic.

Desert Coffin-The Sandbender gathers the sand and encloses his/her victim by hardening it.The result is that of a coffin, then the Sandbender can squeeze the pressure until the victim is crushed and explodes like a balloon filled with tomato juice.

Desert Prison-Similar to Desert Coffin but to a large group of people.

Firebending

Dragon's Roar-Similar to the Lion's Roar attack, except the Firebender exhale a large body of flame.

Rain Of Fire-Similar to the Raining Ice Bullets Of Death but like the name says, rains fire.

hmm, mixing air bending and fire bending would be cool, let's seee...

ah ha! Fire Tornado, a giant whirlwind of fire and air, or has that been done, um...

THanks, and yer pretty close on the ideas of mine!

The Roar attack was from the movie "Kung Fu Hustle" and I never did thought of Haku's attack until now. Still, glad you liked it!

PS=Which moves did you like the best?

Hamster Ball

EarthBenders and Water benders can suround them selves in a sphere of Earth or Ice making them impervious to all atacks. they then use bending to roll the themseves whilst inside the ball crushing anyone in their path.

Spikes of Death

Water benders and Earthbenders can control stalagmites an stalagtites making the staglamites shoot upward and making the stalgtites go downward crushing the opponent (or the other way around I cant remember which one goes up and which one goes downd ?? ) if that doesnt work than the make the Tites or sicles alling in a row and fire them at the opponent like bullets or missiles

Make a fire/water bending move....

Imagine Katara's waterwhip, now imagine doing that same thing, but with fire.

You just use fire as a whip then finish them off with a blast to the chest. Short and to the point

Oh, if you were really patient, and wierd you could do this earthbending move:

You sprinkle a bit of dirt on someone's food or drink or something. Then after they eat it, you form it into a small rock, and then pull it out of there stomach. It would be like being shot from the inside or something.