I've had to say this before--will try again--
The soul that sinneth--it shall die. Period. Sin can not live in the presence of a pure God. Death was the price that Adam and Eve had to pay for rejecting what God said and believing someone else--you shall not surely die--you shall be as God--God had said the opposite. Christ came to oay the price for sin--He paid it for all--for every sinner. His death was the only death that could pay for all sinners as He was sinless. When we stand before God and are judged, those who have accepted His death for their sins are forgiven--His blood paid the penalty.
Christ came as both fully divine and fully human. He did not use His divinity for Himself. He did not go "outside of His human body to bypass the pain"--He endured the pain, the beatings, the crucifixion--all felt--and more. He endured the death of each human ever born or ever would be born--We have no concept of what kind of suffering that entailed. His greatest pain, however, was the separation from God that bearing all sins caused. That is what made Him cry out--"My God, my God, why hast thou forsaken me."--What He endured at that point, He endured on His human faith that He would be resurrected and be with His Father again. It is the same faith we must all have, that we will be resurrected one day also. He did not immediately on His death go to heaven--On His resurrection Mary came to the garden and He told her to not touch Him for He had not yet ascended to His Father. Later--He allowed Thomas to touch His wounds, so He obviously, in between Mary and Thomas, appeared to His Father. He was dead for those days--not in hell, not in heaven--dead. The penalty for sin is death--He paid it,it's a done deal, it just has to be accepted.
Christ paid the penalty--Satan will bear the blame when he and all his followers are thrown into the lake of fire where all sin and death itself will go and be utterly and completely destroyed.