Karma Demon: Iron God Sword

UKarma Demon: Iron God Sword (業魔・鉄神剣 Gōma Tetsu Jin Ken) is an Iron Dragon Slayer Magic Spell.

Description
Iron Dragon Slayer's most powerful attack, where Gajeel claps his hands together above his head then swipes down a gigantic sword which destroys a huge area; even if the sword does not hit, the resulting wide-spread tremor affecting the general area is enough to incapacitate all else nearby. Used to defeat Yomazu and (indirectly) Kawazu.