I am a master of story. I can create vast worlds and lovable characters. I entertain and intrigue, sharing with anyone who wishes to listen or read.

I am the master of cold food. I don't get brain freeze. My friends made me eat a blizzard as fast as I could... didn't get brain freeze.

I am the master of logic.  As proof I offer the following: "The most deliciously readable entries win" and "five winners will be chosen at random" are contradictory statements.  Given that one of these statements is contained in the contest rules, and one is part of the marketing blurb, I can deduce that the effort spent on this post is unnecessary... unless random chance believes in irony.  I'm betting that it does.  :)

I am the master of building an economic power base to swarm my opponents with armies.

I am the master of Undeath. All those who have died will raise up under my command and destroy everything in my path to create an even bigger army until all fall under my command . Being evil is way to much fun.

I am the master of observation. I can see from your eye. I can hear from your heart. I can understand from your body language. I can link to your mind. I can know the whole thing from part of your talk.

I am master of Strategy battle. Setting ambush for surprise attack. Trick people to my trap by providing false information. Making other 2 side in conflict so that they will fight and I am going to take advantage after both side in heavy lost.

I'm the master of random useless history trivia

I am the master of distraction. That means I sow disorder and confusion in the hearts of my enemies... oh wait. No, it rather means I'm liable to forget my things in the unlikeliest of places :P . Makes for a nice treasure hunt afterwards.

I am the master of the masses. Not only am I a quantum phyisicist but also a president in the student government, being a master of mass and the masses of people.

I am.....teh master of the masterverse! All masters bow down to me, look up to me, and more, ALL AT THE SAME TIME! All the Pokemon Trainers just want to be as cool as me so they added "Master" and took out "Trainer". All kung-fu instructors? HAH. They call themselves "kung-fu master" yet barely know how to master their mastery of mastering their masterliness. Aww yeah. And don't even get me started on Masters Degrees....... :D Thanks for the giveaway!

I am the master of my own Destiny, be it through might, intellect, or just plain awesomeilitude. 

The Lord Jesus is the master of my fate; the captain of my soul.

I am a master of theoretical physics. I've already discovered what dark matter and dark energy are and why the universe is not only expanding but accelerating while doing so.

I am the master of telepathy. I'm using my powers to find people who think bad about this game and convince them otherwise.

I am a master of smoke. Be it a bowl or a blunt, I am truly a smoke wizard.

I'm a master of the universe. My dog says I am so it must be true,

I'm a master bater. Removing lime from hides is hard work, ya know!

I'm a master tinkerer. My tinkering, made the demo work on Linux with wine. 

master of origami 

I am Masterminded, the Master of Humility and Denial