Both weapons we have so far have Special acceleration and follow-up effects so I figured they'd all be weapons that "anyone can use" and thought it'd be fun to talk about what sorts of weapons seem feasible for FEH and/ or would be the most useful for their weapon type. For bonus points, feel free to guess who'll introduce them to the game too! For example, I'm certain Thrasir will introduce an Arcane Green Tome since both others we've seen so far have matched the original weapon that their wielders first had (sword for Lif, colorless breath for Grima), just with a different movement type.
The weapons also seem to be "cursed" judging by their JPN name and the recent FB, so they'll likely end up with villains or anti-heroes, for further speculation fodder.
I know we already have a theorycrafting thread, but that's pretty old and I didn't want to necropost. This is also a bit more specific (I think) so I hope that helps too.
Craft away!