How does the New Testament fulfill the Old Covenant?

The Old Covenant, represented by the law, served to reveal humanity's sinfulness and the need for a Savior. The New Testament introduces a new covenant ratified by the blood of Christ, which provides a means of true reconciliation with God. Jesus, during the Last Supper, emphasizes that His blood, shed for many, marks this new covenant. It signifies the complete fulfillment of the sacrificial system, as His atoning death replaces the need for continual animal sacrifices, offering once and for all the redemption that the law could only foreshadow.