Derry are back in Division 1 after an absence of seven years after a one sided victory over Clare secured promotion with one game to spare.
Rory Gallagher's men were in charge from the first whistle against a Clare side that never asked any serous questions, the game all but over after a opening half that resembled an Oak Leaf training session at times.
The victory made it six wins from six for the Ulster champions who have looked a Division One outfit in al but name throughout a hugely impressive league campaign.
Derry made one change from the team that started against Dublin, Gareth McKinless, such an effective half-time substitute against Dublin a fortnight ago, in from the start with Padraig Cassidy dropping to the bench.
The stakes were high for both counties, the Oak Leafers seeking that return to the top flight but Clare anxious to avoid to avoid a first season in Division 3 since being promoted back in 2016 but the opening half resembled a home training session.
Tactically the two teams mirrored each other, both puling every man back out of possession, but there the similarities ended.
Derry were efficient, ruthless and composed while the Banner men looked nervous and bereft of ideas in a half in which the managed only three shots, the first arriving in the 27th minute, and never troubled the scoreboard as Derry turned around with a commanding 0-9 to no score lead.
The story of the first quarter could be summed up a such; Derry seven points from eight shots after nine attacks; Clare no shots from five attacks.
Ironically the visitors had shortage of possession but most of that was in front of Derry's defence with Colm Collins' men struggling to penetrate the home 20m line.
In contrast Derry went through the gears at their ease, the excellent Conor McCluskey and Ethan Doherty the main accelerators for wave after wave of attack that could have yielded even more than the nine first half points they eventually did.
A patient build up brought Niall Loughlin the game's opening score only one minute in a from there Derry were in cruise control with keeper Odhran Lynch spending more time in the opposition half than he was in his own.
Loughlin's opener was added to by scores from Shane McGuigan (2), Conor Glass and Ethan Doherty as Derry were five up after 16 minutes and they had added further scores from Ethan Doherty again and Conor Doherty by the time Emmet McMahon registered Clare's first shot in the 26th minute.
A McGuigan point rounded off the first half action with Derry having a spread of six scorers, nine points to the good and already looking every inch the Division 1 outfit.
Colm Collins' response to the opening half was to introduce both Cillian Rouine and Padraic Collins at half-time but Derry resumed as they had left off McKinless fisting his first score before a Shane McGuigan free took the home advantage out to 11 points with Niall Loughlin unlucky to see a goal chance saved by the keeper of Clare keeper Stephen Ryan.
The game briefly sparked into life as a Keelan Sexton tackle prompted a bit of pushing and shoving that saw the Clare man booked along with Chrissy McKaigue and a black card for half-time sub Collins shortly after.
From there it was only ever about the margin of victory. Clare did manage further scores from Emmet McMahon and Dermot Coughlan but those were only academic footnotes on a totally dominant Derry display. By the end of the season there could be two divisions between these two teams and for most of this game there already looked like there was.
Derry: Odhran Lynch, Chrissy McKaigue, Eoin McEvoy, Conor McCluskey, Padraig McGrogan, Conor Doherty (0-01), Gareth McKinless (0-01), Conor Glass (0-01), Brendan Rogers, Niall Toner, Paul Cassidy (0-01), Ethan Doherty (0-03), Benny Heron (0-01), Shane McGuigan (0-05, 1f, 1m), Niall Loughlin (0-01).
Subs: Padraig Cassidy for McEvoy, 40; Shea Downey for C Doherty, 56; Matthew Downey for N Loughlin, 63; Conleth McGuckian for B Heron, 63; Niall O'Donnell for B Rogers, 67.
Clare: Stephen Ryan, Manus Doherty, Cillian Brennan, Ronan Lannigan, Ciaran Russell, Pearse Lillis (0-01), Alan Sweeney, Cathal O'Connor, Darragh Bohannon, Jamie Malone, Eoin Cleary, Dermot Coughlan (0-01), Ikem Ugweru, Keelan Sexton, Emmett McMahon (0-02).
Subs: Cillian Rouine for A Sweeney, HT; Padraic Collins for I Ugweru, HT; Gavin Cooney for C Russell, 42mins; Micheal Garry for R Lannigan, 54mins; Brendy Rouine for M Doherty, 63mins;Yellow cards: C Russell, 40mins; K Sexton, 48mins;Black Cards: P Collins, 50mins;
Referee: Paul Faloon (Down)
