I just read Vortex of Teeth in the Spell Compendium. It is a 4th level Wiz/Sorc/Druid spell, and it is BADASS. It creates, at Medium range, a 40' radius, 20' tall cylinder or translucent piranhas made of a mixture of 1 part magical force and 2 parts voracious, flesh-consuming hunger. In the center is a convenient, 5'x5' safe spot for something you don't want eaten to stand in. It also has the potentially invaluable ability to affect incorporeal creatures (since it's a Force spell). Unfortunately, despite being a very, very cool spell, it only deals 3d8 damage. Fortunately, it deals damage every round for 1 round/level, unless dispelled.