They come at you in waves, this Avalanche team. Length-of-the-rink speed that puts even experienced opponents on their heels. Four lines that can explode onto the score sheet. A power play that has carried momentum from the previous round. And a no-frills, detail-oriented defense that doesn’t allow any breathing room. Did we mention the speed? Moving like it had rocket boosters attached to its skate blades, the Avalanche overwhelmed the Tampa Bay Lightning in Saturday’s Game 2 of the Stanley Cup Final, scoring early and often in a commanding 7-0 win at a raucous Ball Arena. The Avs two wins from their first Cup in 21 years, two wins from ending the Lightning’s two-year reign over the NHL, two wins from putting an exclamation point on the franchise’s reclamation and two wins from possibly beginning their own era of dominance. Such lofty thoughts shouldn’t be dismissed. That’s how good the Avs played to take a 2-0 series lead and, well, how lethargic, tired and worn out Tampa Bay appears to be. Valeri Nichushkin and Cale Makar scored two goals apiece, two of five Avalanche players who had at least two points.