Can we get a Zantetsuken for DRK's from Odin?

[UBERHAXED]

A large number of pre-HW DRK weapons are just scaled up versions of one-handed swords. Most of their primal weapons, their Allagan weapons, and their tomestone weapons are all just big versions of the corresponding PLD weapons. There are a number of them among the leveling swords as well.

Everything you just mentioned are arbitrary products of the game's lore. Odin is an actual character from Norse mythology and furthermore has the same incarnation in this game that has followed the previous FF games.