There is high juice attached to taking the Under here. And for good reason. There have been a combined four goals scored during the first two games of this Western Conference Final. 
The Stars have reverted back to their style of play they used during the regular season, which is stressing defense being conservative. It worked in Game 1 when they won, 1-0. The Stars aren't panicking after losing, 3-0, in Game 2. They are going to stick to their defensive formula. They need to protect backup goalie Anton Khudobin and don't want to get into an up-and-down type of shooting match with Las Vegas and leave Khudobin vulnerable. 
The Golden Knights are the better team. They have no reason to take chances. The Stars are cold - 117 minutes and 24 seconds without a goal - and Las Vegas' has by far the superior goalie, Robin Lehner. He has the fifth-highest postseason save percentage in NHL history and is looking to be the first goalie since 2004 to record five shutouts during a single playoff year.