Rereading the last chapter, the name here didn't seem right, but it might be a case of me not knowing how words in khazalid work. Or is this the name of the fighting style that Branulhune enables?
Yes, Branulhune is the blade, Branarhune is the style of combat we are trying to develop, consisting of 4 core techniques:
1) Momentum sink:
Using the fact that when Branulhune is summoned it is stationary (relative to us or to Mallus? I don't remember. It is often the same thing, but not always), we can dismiss and resummon it to shed any momentum it has, allowing very fast recovery even from massive, seemingly overcommited swings.
2) Quick draw:
Using the fact that we can summon Branulhune at a moment's notice, we can use this technique to suddenly murder unsuspecting opponents from seemingly unarmed state.
3) Hand switching:
Using the fact that Branulhune, despite being a greatsword, can be wielded one-handed, we can dismiss it from on hand and summon into another, drastically changing the profile of the strike and effectively enabling us to turn any attack into a feint post factum.
4) Guard bypass:
That's basically an extension of the quick draw - we can dismiss Branulhune before the opponent's parry, continue the motion with hands alone and resummon the blade after the parry, both unbalancing our opponent and bypassing his defense, which makes parrying very unreliable method of defense against Branulhune.
ATM we developed (1) and (2), critting on the (2).