The Messianic covenant is the covenant that God made with the nations via the Messiah of Israel:

Hebrews 8:10

For this is the covenant that I will make with the house of Israel after those days, says the Lord: I will put My laws in their mind and write them on their hearts; and I will be their God, and they shall be My people

The Messianic covenant will not only depend on miracles, but also those who walk in it will have to acknowledge the prophetic revelation that unites the law of Moses (being the Torah) with the New Testament:

Matthew 7:22-24 (NKJV):

22 Many will say to Me in that day, ‘Lord, Lord, have we not prophesied in Your name, cast out demons in Your name, and done many wonders in Your name?’

23 And then I will declare to them, ‘I never knew you; depart from Me, you who practice lawlessness!’

Matthew 5:17- The prophetic part of the law of Moses, fulfilled in the Messainic covenant:

[ Christ Fulfills the Law ] “Do not think that I came to destroy the Law or the Prophets. I did not come to destroy but to fulfill, (bring into it’s accepted state of fulfilled state).

The seasons or holy Sabbaths of God, will be established as times of worship in the Messianic covenant:

Revelation 22:14 Tree of life with 12 fruits:

14 Blessed are those who do His commandments, that they may have the right to the tree of life, and may enter through the gates into the city.

Isaiah 66:23 – New moon and Sabbath:

And it shall come to pass That from one New Moon to another, And from one Sabbath to another, All flesh shall come to worship before Me,” says the Lord.

Isaiah 11:1-2 (NKJV)

The Reign of King David’s father known as Jesse:

11 There shall come forth a Rod from the stem of Jesse, And a Branch shall grow out of his roots.
2 The Spirit of the Lord shall rest upon Him, The Spirit of wisdom and understanding,
The Spirit of counsel and might, The Spirit of knowledge and of the fear of the Lord.

Isaiah 46:10

Declaring the end from the beginning, And from ancient times things that are not yet done, Saying, ‘My counsel shall stand, And I will do all My pleasure,’

Revelation 21:6
And He said to me, “It is done! I am the Alpha and the Omega, the Beginning and the End. I will give of the fountain of the water of life freely to him who thirsts.