I would say that MY answer would have to be Christ's Crucifixion. That WAS the ultimate redemption, so says scripture.
"Even as the Son of man is not come to be ministered unto, but to minister, and to give his life a redemption for many."- Matt 20:28
"In whom we have redemption through his blood, the remission of sins, according to the riches of his grace"- Ephesians 1:7
"Neither by the blood of goats, or of calves, but by his own blood, entered once into the holies, having obtained eternal redemption."- Hebrews 9:12