The Dragons with only 12 players, were always up against it with the Blues dominating from the outset. Within minutes of the kick-off, Chloe Smith began the rout with a try which was converted by Brogan Jones.
A few minutes later Blues captain and outside half Brogan Jones weaved in and out of the Dragons defence, Jones making a cheeky dummy to cross over for a try.
The Dragons showed some quick running ball skills and came close to the Blues tryline, but could not find gaps within the Blues defence.
With the Blues fowards stealing the ball and passing out wide the Blues added a further 33 points to lead 45-0 at the break.
The Blues started the second half in confident mood and with a few changes made at the interval, the second half was again a feast of running rugby which meant scrum half Amberlery Ruck placing the ball over the Dragons tryline with ease, converted by Brogan Jones.
Blues: Chloe Smith, Brogan Jones, Bethany Johns, Rebecca Wrigley (2), Cerys Ballett, Ffion Edmunds, Amerlery Ruck; Cons: Brogan Jones (6)