HUGE Problem!!! Need help.

I bought myself some AFR 165 heads, assembled the motor and was putting the valve covers back on and a bolt snapped in the head. We then drilled the bolt and started pulling it out with an extractor and would you believe that it (the extractor) also snapped inside the bolt. So I had gotten no luck with shattering or removing the small piece of extractor because I believe some dark forces, like wizards and gnomes, just don't want me beating Camaros all day long. And apparently this extractor is made out of Wolverine’s bones from X Men.

So here are my questions:
1. Does anyone have an idea on how to remove this evil from my cylinder head (remember it is a valve cover bolt).

2. If I can not get it out, I was thinking of using a silicon called "The Right Stuff" which I have heard is amazing along with the gasket, while tightening the 5 existing bolts down evenly. Will I have a major leak problem or will I be ok missing one valve cover bolt?

Now for an idea which one it is, looking at the driver's side valve cover, the bolt that snapped is farthest right and in the back, closest to the intake manifold.

Please help, I've had the most unfortunate events happen on the day I was going to put the engine back into my car. Thank you all for your help in advance.