Congratulations!
So, the black knight greatsword has become one of my favorite weapons for random invasions. Its moveset is so amazing! The uppercuts suck in duels, but in random invasions most hosts arent good enough to avoid it. Works BEAUTIFULLY after a backstab. Most people try to block it.... ha, it's always so cute as that plan fails and they fly up in the air and take upwards of 700 damage.