Eugene's eyes narrowed as his face turned ugly. He tried to use his left hand to grab his right wrist to stop the overflow of blood.
Dean grabbed onto broken wrist of Eugene as if it was the hilt of the sword and took the opportunity to retreat and increase the distance with Eugene.
He wanted to get free breath from the intense battle.
He coldly stared at Eugene as he held onto the sword's hand and pulled off Eugene's broken hand. He threw the hand onto the ground which was full of mucus. He didn't previously attack Eugene because it was Eugene's broken hand which was holding the handle of the sword.
Ian and others had cold sweat drip down their bodies as they watched the life and death battle. They knew that they would have lost or even killed if any of them fought against Eugene or Dean.