Forget wearing sunglasses or funny hats or anything like that to intimidate Phil Hellmuth.
All you need is this...
BEHOLD!!!...

THE CHUCK NORRIS MASK O' FEAR!!!
To use: Simply expand the mask to fit your head using Photoshop or something similar. Print. Cut along dotted lines including the eyeholes and the holes on the side. For added strength, mount the mask on poster board or cardboard. Tie a string or piece of elastic to the holes on both sides of the mask. Intimidate away!
Hellmuth won't be able to concentrate on his cards, his palms (and probably genitalia) will sweat constantly and he is guaranteed to piss himself at least twice.
And don't worry if you never get the Ace of Spades because for Chuck Norris, every card is the Death Card.
Good Chuck and Chuckspeed.