Are you suggesting that YHWH's promise to the Levites ended with Yahshua? If so I'm not buying it. His promise of David is fulfilled in Yahshua eternally. Malki Tzedek is not of Levi.
(CLV) Jer 33:20
Thus says Yahweh: If you could annul My covenant with the day and My covenant with the night so that daytime and night fail to come about in their proper time,
(CLV) Jer 33:21
then also My covenant could be annulled with David My servant, so that he should not come to have a son reigning on his throne, and that with the Levites, the priests, My ministers.
Night and day are still here.
It was all fulfilled in Christ. He is our prophet, priest and king. That is why they have no more need of an old covenant priest or king. There is nothing greater emphasized in the New Testament than how Christ is heir to all the Old Testament promises and prophecies relating to the promised Messiah. Throughout it we repeatedly see it stated that Christ was here to fulfil a foreordained plan. He was indeed a man on a mission. Our Lord’s whole life from the cradle to the cross, and thereafter, was a catalogue of confirmations of Old Testament truth. Jesus continually stressed the importance of accomplished prophecy, by stating “It is written” or asking “Have ye not read?” He would then follow this preamble up with a quote from the Hebrew text in order to explain a truth, reinforce a point or prove a fulfilment.
Jesus reveals, in Matthew 13:17, that the old covenant prophets and righteous leaders longed for His day, asserting: “verily I say unto you, That many prophets and righteous men have desired to see those things which ye see, and have not seen them; and to hear those things which ye hear, and have not heard them.” He was the long-anticipated deliver of Israel. Nathanael testified to Philip in John 1:45: “We have found him, of whom Moses in the law, and the prophets, did write, Jesus of Nazareth, the son of Joseph.” Our Lord accomplished every expectation that the Old Testament writers predicted.
Jesus famously rebuked the two downcast disciples on the road to Emmaus on resurrection day, stating: “O fools, and slow of heart to believe all that the prophets have spoken: Ought not Christ to have suffered these things, and to enter into his glory?” (Luke 24:25-26). After this, he began to open their eyes to the meaning of the sacred pages. Luke 24:25 records: “And beginning at Moses and all the prophets, he expounded unto them in all the scriptures the things concerning himself.”
His intent was to confirm that He completed every demand that was made of Him from the ancient inspired pages. His life was the perfect realization of predicted Old Testament prophecy.
The New Testament writers were equally aware of the importance of Old Testament prophecy and its focus on the life and ministry of Christ. They often referenced the Hebrew text to reinforce the fulfillment of numerous Old Testament predictions pertaining to the life of Jesus. Matthew especially brings this out.
Matthew 1:22 records, “all this was done, that it might be fulfilled which was spoken of the Lord by the prophet.”
Matthew 2:15 says, “that it might be fulfilled which was spoken of the Lord by the prophet.”
Matthew 2:23 declares, “that it might be fulfilled which was spoken by the prophets.”
Matthew 4:14 says, “That it might be fulfilled which was spoken by Esaias the prophet.”
Matthew 8:17 says, “That it might be fulfilled which was spoken by Esaias the prophet.”
Matthew 12:17 says, “That it might be fulfilled which was spoken by Esaias the prophet.”
Matthew 13:35 records, “That it might be fulfilled which was spoken by the prophet.”
Matthew 21:4 declares, “All this was done, that it might be fulfilled which was spoken by the prophet.”
Matthew 26:56 says, “all this was done, that the scriptures of the prophets might be fulfilled.”
Matthew 27:35 says, “that it might be fulfilled which was spoken by the prophet.”
But elsewhere statements are made by Christ proving His Messianic fulfilment. Jesus testified in Luke 18:31: “Behold, we go up to Jerusalem, and all things that are written by the prophets concerning the Son of man shall be accomplished.”
Jesus said in Luke 22:22: “truly the Son of man goeth, as it was determined.”
Jesus affirmed in Luke 22:37: “this that is written must yet be accomplished in me.”
Jesus tells us in Luke 24:46: “Thus it is written, and thus it behoved Christ to suffer, and to rise from the dead the third day.”
Jesus instructed in John 5:39: “Search the scriptures … they are they which testify of me.”
Acts 3:18 testifies: “those things, which God before had shewed by the mouth of all his prophets, that Christ should suffer, he hath so fulfilled.”
Acts 13:29 records: “when they had fulfilled all that was written of him.”
1 Corinthians 15:3 and 4 make two references to key elements of our Lord’s ministry, adding the suffix: “according to the scriptures.”