Stuart Lancaster's Leinster extinguished English interest in the Champions Cup by inflicting a 30-19 defeat on reigning champions Saracens at the Aviva Stadium.
The Irish province and tournament top seeds will face the Scarlets in the semi-finals at the same ground - most likely on Saturday, April 21 - after completing a conclusive victory in Dublin.
Ireland openside Dan Leavy was outstanding to pick up where he left off in the Grand Slam-clinching win at Twickenham a fortnight ago, crowning his performance with a terrific 47th-minute try that ultimately swept the match beyond Saracens' reach.
Dan Leavy flies towards the try line in a man of the match performance for Leinster vs Saracens
Garry Ringrose and James Lowe also touched down to confirm Leinster's dominance and it was a fully deserved victory for the team bossed by former England head coach Lancaster. Leinster played the better attacking rugby from start to finish.
Saracens' doggedness ensured they were never put to the sword and trailing 13-12 at half time they had hope of continuing their quest for a record-equalling third successive European crown deeper into the knock-out phase.
A try for Blair Cowan in the 64th minute revived Saracens spirits after Leinster built a commanding lead, but the wall of blue shirts refused to crack again even though it was the visitors from across the Irish Sea who were ascendant throughout the final quarter.
Owen Farrell (r) kept Saracens in it at half-time after converting three penalties in the first-half
Mako Vunipola, who saw his brother