Nothing at all, we are called to, but upon death, the die is cast. Up or down. If you have Jesus as your Savior, you already have His mercy, if not, well, there ya go, and no amount of prayers, hail marys, or begging is gonna get you there.
As for answering a question with a question, you still have not answered mine. WHy is Jesus not sufficient for you to go to heaven, to get there? Why do you feel His sacrifice ‘needs a little extra help”?
I never said anything otherwise. Why do you think someone praying means that they think Jesus is not sufficient?
Is your God bound by time, or master of it? You seem so hung up on the fact that, for a human, time is linear. Why is that?
If I hear that someone I loved was in a car crash, can’t I pray to God that she is OK while I drive to the hospital? Now, in linear time, she may already be dead. Does that make my prayer foolish? Does that mean God can not help me or her?
Similarly, if I hear someone has died, why can’t I say a prayer that they found God’s mercy and forgiveness before they died?
I don’t think God has a problem with time. Do you?