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Zantetsuken is amazing in Birth by Sleep, at least in my opinion.  Timelinesplitter Chaos 21:19, January 8, 2013 (UTC)

Ooh, what does it do? - TidusTehSacrificer357 23:50, January 9, 2013 (UTC)
It automatically kills an enemy/enemies. It's one of Terra's ultimate techniques, I think you can only acquire it by command blending and/or buying it at a command/medal shop. It takes awhile to charge and to reload though. But it's pretty awesome against annoying enemies.  Timelinesplitter Chaos 23:46, January 11, 2013 (UTC)