Serious sober question: the OT priest who performed the office of mediation. Is he guilty of blasphemy? If I, a God-loving Jew, asked him to pray to God for me, would I have been guilty of blasphemy?
My guess is the answer will be in reference to HEbrews and say that you would be certainly in the clear up until the sacrifice of Christ and possibly in the clear (though missing something) if you were a devout modern Jew and there were still a temple.
No, it was his function as discribed completely in the OT. He, the purified priest, would once a year go into the holy of holies to bring the prayers of the people, and their sacrifices, to God.