1. Christ, the true Priest who became the ransom for our salvation (Mt 20:28)
    1 Tim 2:6, Isa 53:10, Heb 9:11-12, 25-26, 28

The representative work of Christ is the work of kings, priests, and prophets. Jesus is the true Priest, the Christ, who became the ransom to save us. (Mt 20:28, 1 Tim 2:6)

Mt 20:28 Even as the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many.

1 Tim 2:6 Who gave himself a ransom for all, to be testified in due time.

In the Old Testament it was foretold that Christ would be a trespass offering for us. (Isa 53:10)

Isa 53:10 Yet it pleased the Lord to bruise him; he hath put him to grief: when thou shalt make his soul an offering for sin, he shall see his seed, he shall prolong his days, and the pleasure of the Lord shall prosper in his hand.

By dying on the cross, Jesus accomplished eternal atonement for us once and for all. (Heb 9:12,25-26,28)

Heb 9:11 But Christ being come an high priest of good things to come, by a greater and more perfect tabernacle, not made with hands, that is to say, not of this building;
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.
25 Nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others;
26 For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself.
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.