There isn't much to say here, since there aren't that many differences between the standard and Heroic Mine Cart. When possible, use your Boom! spells in pairs to clear the board and heal up whenever possible. This one's going to take a lot of luck, so don't be discouraged if you don't get it the first time. Just keep at it!
http://www.shacknews.com/article/92234/shack-reels-hearthstone-league-of-explorers---uldaman-heroic
Gunvolt Chronicles: Luminous Avenger iX 2 Hands-On/Thoughts
Check out my hands-on/thoughts for Gunvolt Chronicles: Luminous Avenger iX 2!