Impossible; For Jesus is alive forevermore.
An 'eternal sacrifice' would have an eternally DEAD person.
Or an eternally DYING person.
And it’s not the dying that procures the remission of sins, it’s the DEATH, past tense.
Somehow Catholics have it in their minds that suffering somehow expiates their sins so that the dying part is what’s important, but wouldn’t it be just like Satan to focus on the dying and not on the death which gives us the forgiveness and the LIVING that we do after that?
Salvation is about LIFE, not about dying.