To clarify: the Mass if often described as a representation of Calvary and the sacrifice of the Mass is seen as a replacement for the sacrifices offered by the Levitical priesthood before the coming of Christ. Christ is offered in an unbloody mannner. I know the Cathechism. 
   In fact, this is where the problem of corruption of the priesthood arises. The power given to the priest is almost god-like. He is interceding for the people and offering sacrifice on their behalf. This is also why there is a history of abuse and corruption in the church. It was this very priesthood that authorized the crucifixion. 
   There is one high priest and no more offering for sin. The Mass is a communal celebration of Christ's death and resurrection for our salvation. In this view the Real Presence is no less real. It is a matter of whether the power belongs to God or resides in the sacramental powers of the clergy. Mystery, miracle and authority are the tools of the Grand Inquisitor in Dostoevsky.