When Harry Potter was a baby, Voldemort killed Harry's mother, whose sacrificial death filled Harry with a protective shield. As Voldemort tries to kill baby Harry, the curse rebounds and strikes Voldemort instead. By then Voldemort had murdered many times and already created several Horcruxes so his soul was fractured multiple times, and the force of this curse caused a piece of Voldemort's soul to fly out and it embedded itself in Harry, turning Harry into a living Horcrux. So from infancy Harry carries the curse of evil and death within him.
Years later, Harry once again faces Voldemort, this time offering himself as a sacrifice to save others, neither being aware other magic is at work. Blood magic and wand magic, once more conspire to protect Harry from death. What IS Killed is the Horcrux, the piece of Voldemort's soul within Harry. The evil one, while thinking he was killing Harry, succeeds only in killing himself. Harry comes back to life and leads his friends to victory.
Harry Potter - his mother gave her life to save him.
The parallels are clear. When Jesus became incarnate, he became fully human, and thus Jesus, too, carried that dark curse of death within his human body. When he hung on the cross the real evil one thought himself victorious - but the darkness of death could never extinguish the Light. Instead all he destroyed was Death's power. Jesus rose again, after spending time rescuing the people trapped in Hades (according to the Orthodox), and death was swallowed up in victory.
So Jesus made atonement for our being through the incarnation, our wellbeing through his life and death, and our eternal being through his resurrection. Every bit of his life, death and resurrection was dedicated to opening the way for our transformation, our 'new creation', our freedom to grow into the image of God. How dedicated are you towards accepting, rather than fighting that transformation process in your life?