Oh it better [tornado fang]ing not. 
Sakura, you should be more worried about the fact that it will probably be able to learn pretty much any attack with the word "slash", "blade", or "cut" in it(which is a much larger group of moves than one would expect, and most of them have a high crit ratio). And let's face facts, Game Freak is likely going to make an elemental trio of blade attacks(Fire, Ice, Thunder) for the occasion as well, because why not(I actually do expect them to do so at some point, and a generation where they have an actual sword for a mon to work with is as good a time as any). And as a Ghost type that has a Pokedex entry that says that it can suck the life of whoever wields it like a sword, the chances are more than good that it'll have a life draining move as well(and likely a new physical Ghost type version at that, unless they decide that Giga Drain and its ilk would qualify as "absorbing life force from others" in that sense(I had always considered said series of Grass type moves to be the equivalent of a blood sucking move, rather than a pure "life force drain"))...
Anyways, it could be far worse. Duoblade could be able to learn Guillotine(three guesses as to why that would be worse, and the first two don't count).