“First off we have the man who can wield a bearing-sword-sized, or bigger, blade as effortlessly as a dagger, provided it started out as one.” That’s not actually Jack’s power. He extends the cutting edge of the blade, not the blade itself. So he can cut you from across the room, but whatever he uses stays the same size. The benefit to using bigger weapons is that the force behind the swing also transfers.
Right. I guess my description of it was a bit influenced by the visual symbolism for his power in the piece I was talking about.
I think the description still kinda works if you take it with a pinch of metaphor salt. The blades don’t really grow, but in practice, it’s almost like that’s what he’s doing.
Incidentally, another benefit I can see to his power is that he can swing without being hindered by his surroundings. It remains to be seen whether the semi-metaphorical extension actually gives any feedback on the dagger’s end when the extended cutting edge hits something, but if it does, it still allows him to adjust his weapon according to the needs in the moment. Either way, he’d be able to swing a weapon effectively sized like a greatsword or bigger like he would a dagger or longsword, instead of the polearm-like way you’d normally have to use a greatsword.
In other words: Swinging a greatsword like a longsword or broadsword would usually cause the ground to get in the way of your sword movements, forcing greatsword wielders to use it like a polearm instead. Jack, however can use a smaller blade to avoid this problem and still get the range and power benefits of a greatsword (and beyond).