By James Wong The Melbourne Unicorns face Power House in the first round of the Dewar Shield at Mossfiel Reserve on Saturday. Melbourne were beaten in the semi-final last season and are trying to get back to the top of the competition following a Dewar Shield triple from 2009-2011. Power House finished with just two wins and a draw last year and were ahead of only Endeavour Hills on the ladder. "We expect it's going to be a physical game, it always is. They're going to be much stronger than where they finished last year," Melbourne head coach Tumai Edwards told Rugby News. "Both teams have had a few new players turn up to the club so it's going to pretty interesting to see what the result is." Edwards is in his first season as Melbourne head coach after serving as assistant coach last year. The Unicorns had a busy preseason with a trial match against Harlequins and a trip away for a team camp where the squad was put through its paces. “We've had a good pre-season; we've got a