Mikko Rantanen has had a roller-coaster season. At the beginning of the year, the star right winger was a key component of the Colorado Avalanche. Then, in a shocking move, the Avs traded him to Carolina. But because Rantanen didn’t sign a contract extension with the Hurricanes, Rantanen was dealt again at the trade deadline, going to the Dallas Stars. But in his first game as a Star Saturday night, Rantanen looked like a man reborn.