I guess it would be necromancy if you don’t believe in everlasting life. I guess you think Christ’s blessed mother isn’t in heaven and alive.
Do you believe Jesus’s Mother will be descending with HIM, or do you believe she too will be raised incorruptible from her grave and that ‘we who are alive and remain’ ... ‘shall be transformed’ to join those dead who are raised incorruptible to meet the Lord in the air’? Read the Bible and think about what ignoring what GOD says in His Word means if it requires you to put traditions of men above God’s Word.
Don't you think God believes in everlasting life? Did the prophet Isaiah? When God specifically gives instruction through him that said: "should not a people inquire of their God? Why consult the dead on behalf of the living? Consult God’s instruction and the testimony of warning. If anyone does not speak according to this word, they have no light in them.", should we just ignore that warning? I won't.
It sure sounds to me like Almighty God does NOT want us to try to contact, consult, or pray to (by the context) those who have died. Instead, he says we should inquire of, consult and pray to HIM and NOT those who have died - it doesn't matter how holy they were (Samuel, for example). I'm positive Mary is in heaven with the Lord, though she is awaiting her glorified body like all the others who are there with her.