Gen 3:15, 1 Jn 3:8, Heb 2:14, Mk 10:45, Heb 9:12,28, Heb 10:14, Jn 14:6, Mk 15:37-38, Heb 10:20

In the Old Testament, it was foretold that Christ would come and accomplish Christ's work on the cross. (Gen 3:15)

Gen 3:15 And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.

The work of Christ is that of kings, priests, and prophets. Jesus completed the work of Christ by dying on the cross. (Jn 19:30)

Jn 19:30 When Jesus therefore had received the vinegar, he said, It is finished: and he bowed his head, and gave up the ghost.

As the true King, Jesus broke the head of Satan on the cross. (1 Jn 3:8, Heb 2:14)

1 Jn 3:8 He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.

Heb 2:14 Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death he might destroy him that had the power of death, that is, the devil;

As the true Priest, Jesus died on the cross for our sins. (Mk 10:45, Heb 9:12,28, Heb 10:14)

Mk 10:45 For even the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many.

Heb 9:12 Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us. 28 So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.

Heb 10:14 For by one offering he hath perfected for ever them that are sanctified.

As the true Prophet, Jesus opened the way to meet God on the cross. (Jn 14:6, Mk 15:37-38, Heb 10:20)

Jn 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.

Mk 15:37 And Jesus cried with a loud voice, and gave up the ghost. 38 And the veil of the temple was rent in twain from the top to the bottom.

Heb 10:20 By a new and living way, which he hath consecrated for us, through the veil, that is to say, his flesh;