The six-year-old mare only got off the mark on her third start over the bigger obstacles at Kempton in November and was last of four in a Listed contest on heavy ground at Warwick in December.
However, freshened up thanks to a run on the all-weather at Kempton last month and with quicker ground, Really Super gave a thoroughly professional display to lift this competitive contest.
After tracking the leaders, Jack Quinlan brought the mare to lead three fences from home and she stuck on well to land a cosy success.
Fidux was beaten five and a half lengths in second place with another three lengths to Solomon Grey in third.
Murphy said: “It’s brilliant for her, the owners and the team and it’s great to get the season underway like that.
“She loves fast ground, so this was a race we targeted for a while to try to get her some black type. Then it was raining and we were a little bit nervous, but the ground was fine. Market Rasen did a brilliant job.
“She jumped like a bunny rabbit today and on her Kempton performance you would not believe she was a novice.
“She had a lot of experience on the Flat, so I was pretty confident she would hold her own and would not curl up in a big field.
“Her main aim this season was black type which she has now got, so we can pick and choose our races a little bit now.”
Red Force One (5-1) is a possible for the valuable Galway Hurdle after a smart performance to win the Betway Summer Handicap Hurdle.
Sharper for a recent run on the Flat, the five-year-old, whose owners include Sir Alex Ferguson, had too much speed for his rivals in the closing stages.
Paul Nicholls’ charge stormed past Fair Mountain on the flat in the hands of Harry Cobden to score by two and a quarter lengths.
“We’re well pleased with that. He had a nice run on the Flat the other day,” said Nicholls.
“It took him a little time to warm up. Halfway round it didn’t look as though it was going to happen today, but then he got to them and stayed on strongly.
“He loves going right-handed, so I’ve just made an entry for him in the Galway Hurdle at the end of the month.
“If he doesn’t run in that, he might just wait for the better handicaps in the autumn at Ascot and we’ll find a race for him on the Flat in the meantime.”
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