Alright. Lemme lay this out for you.
Me and you... we tend to snark at each other a lot, but otherwise? I got no beef with you. You like to cause mischief, which I can totally get behind and enjoy the hell out of. The 'trying to rule the world' thing is a little too Dr. Evil for my taste, but hey, whatever gets you through the day.
But let me just say something here, and understand that this is not a threat. It's merely some fun facts bundled up with a promise.
To my best knowledge, I am unkillable. Anything you do to me, no matter how severe, I will heal from. Now. YOU may be unkillable as well. I have no clue. But regardless, I'm really not someone you want on your bad side.
That being said: Captain America is trusting you with something very important to him. And I promise you... if you betray him? Or make him in any way regret trusting you?
Since apparently I'm no hero anyway, I will not hesitate to put a bullet in your skull. We'll see how easily you get over that.
A vague disclaimer is nobody's friend. Have a nice day!