Antrim scored two injury-time goals to earn a dramatic 2-14 to 0-20 draw with Offaly and secure a spot in the Hurling League Division 2A decider.
The Ulster visitors trailed by seven points early in the Tullamore game but eight Neil McManus scores saw Antrim go in 0-13 to 0-9 behind at the break.
Offaly increased their lead to six going into added time but were stunned as McManus and Conor McCann netted.
The unbeaten Saffrons will take on Kerry in next Saturday's final.
Antrim started Sunday's game at O'Connor Park knowing they would make the decider as long as they did not lose by 18 points or more while Offaly would advance to the final with a victory.
The Saffrons are seeking a return to Divison 1B having been relegated in 2018.
Offaly, with the wind at their backs, raced to a 0-8 to 0-1 lead with Eoghan Cahill firing over four points.
Conor Johnston was Antrim's only other scorer as McManus pulled the Saffrons to within four points at the interval.
McManus kept his team in touch with another five points and Antrim came close to a goal when Donal Nugent's strike from a 20-metre free was saved by James Dempsey.
Offaly were looking good for victory going into six minutes of additional time with a six-point advantage but McManus capped an outstanding display by scoring Antrim's opening goal before McCann clinched the draw.