The team's new enforcer has dished out black eyes and bruised jaws in two bare-knuckle fights at the last two Arena home matches.
And the job of re-arranging features is one he relishes.
The big Canadian winger said: "I have shown against Cardiff and Nottingham that if you mess with my teammates then you mess with me. You mess with me then you get a bloody nose, you get hurt and your wife thinks you're more ugly than when you left the house.
"Trust me, I will make people ugly if they mess with my teammates."
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Cornish, who has fought heavyweights Brad Voth and Ryan Shmyr on home ice, said: "Sheffield has been too easy a building to play in for the last few years. Players were not worried coming here, that has to change. Opposition players should be waking up in a cold sweat on the day they are coming.
"I want players shaking when they are tying their laces up in the away dressing room. I want them looking over their shoulder all night.