For those who don't have Twilight Princess but would like to know:
The move Twilight performed while fighting Dink is called the helm splitter. It's one of the Hidden Skills that the Hero's Shade, aka Time (but as a skeleton oof) taught him
This move is often an instant kill. It is harder against Lizalfos, so the goal is to quickly turn around and deliver a slash. He lands with his back to the enemy- which made Dink grab him from behind (and bit Twi's arm ouch). But it's one of the most powerful moves Shade taught him- he practically ripped out Dink's shoulder.
One of the art screenshots is not Lu, but art Jojo did of shade teaching him to do it. (Can confirm it was terrifying- bro stopped the blade an inch from Twi's head- after telling him it's called the helm splitter)
Hello dol community, let's me propose you an small headcanon – Whitney has a small dick. He just do, he's a big bad mean bully, he got such an enormous ego and I can't help but think he must be compensating for something else ... his dick, for example.