Famitsu Dendou Blade, and that Katana S rank sword from titles?

[Malice913150]

On another note, since the +50% unsealing bonus for Dendou Blade (biggest such bonus in the game) stacks with extend bonuses, the weapon is incredibly overpowered.

needs power to match its beastily amazing appearance :P

[Tycho]

It probably just has some ridiculous and arbitrary kill count to unseal it. Like the original.

Reading on the Japanese wiki, people tried that, to no avail so far.
But yeah, they'd better have thought something out for it, or this game can't be considered complete!