Think about this. Enma and Wado were both made by the same guy. Which sword wasn't?
Since Kitetsu was an unlucky sword,
what number represents bad luck? 13.
Now watch this. What letter of the alphabet are their names
Z (26th) + O (15) + R (18) + O (15) = 74
K (11th) + A (1) + I (9) + D (4) + O (15) + U (21) = 61
74 - 61 equals 13.
When the store owner said Kitetsu's owners die a horrible death, he meant Kaido. But instead of using Enma, he's going to use Kitetsu confirmed!!!