The "New Covenant in my blood" would be inaugurated when Christ first ascended to the Father the morning after His resurrection, was consecrated our high priest forevermore, and sprinkled His blood on heaven's mercy seat as our mediator.
How do you reconcile that with Hebrews 9:24?
Hebrews 9:24
For Christ has not entered the holy places made with hands, which are copies of the true, but into heaven itself,
now to appear in the presence of God for us;
How often does Jesus travel from earth into Heaven to present His perfect sacrifice for us?
Based on your statement and this passage from Hebrews, you must believe at least twice, right?
But scripture says
only once:
25
not that He should offer Himself often, as the high priest enters the Most Holy Place every year with blood of another— 26 He then would have had to suffer often since the foundation of the world; but
now, once at the end of the ages, He has appeared to put away sin by the sacrifice of Himself.
If I understand you correctly, you are asserting that, sometime after He came out of the tomb and appeared to Mary, but before he appeared to His apostles, that Christ ascended to heaven and presented Himself as the firstfruits offering, then returned to earth once that offering was accepted By God.
If this is your position, I still don't see How you can reconcile it with
Hebrews 9:24?
"For Christ is not entered into the holy places made with hands, which are the figures of the true; but into heaven itself,
now to appear in the presence of God for us:"
The writer of Hebrews, writing in the 60's AD, some 30 years after your proposed "ascension & return" claimed that at the time he was writing, Christ was presently in heaven offering himself as the sacrifice for us.
Your view has Him offering Himself the 2nd day after Passover, Having that offer Accepted By God, returning to earth, then ascending again and offering himself AGAIN, which the writer of Hebrews explicitly says CAN NOT BE:
Hebrews 9:25-26
"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.'
Im definitely curious to know what sort of "get around" to this you are applying to support your contention.