Board Thread:Theories and Speculation/@comment-5407586-20150624095943/@comment-3279282-20150627175552

Were was it implied before?

Again, this is all based on the fact that Sasuke called Deidara's hand seal the Earth Release seal, meaning that Earth Release is somehow used in the explosion, because Deidara formed the seal when his C4 exploded.

There's no indication that the Earth seal has a) to do with the creation of the clay, because the clay is already there or b) with the clay's movement, because while chakra is indeed used to move the bombs, the hand seal wasn't used when the C4 moved and c) the Earth seal isn't the seal that was shown when Sasuke talks about it (even though I admit that it would make more sense if the Earth seal was the Katsu seal).