As a fan, that’s what killer instinct means to me. Beat a team on the scoreboard but also rough them up physically, find a grudge match angle and run them into the ground.
Not the greatest Leaf, not the best, not even the best/greatest on his own line while he was here, but my favourite Leaf player:
Darcy Tucker
He would punch your kid in the face if it meant the team had a better chance to win the game.