CCC 1105
Christian Mystery›SECTION ONE THE SACRAMENTAL ECONOMY›CHAPTER ONE THE PASCHAL MYSTERY IN THE AGE OF THE CHURCH›III. The Holy Spirit and the Church in the Liturgy
The Epiclesis ("invocation upon") is the intercession in which the priest begs the Father to send the Holy Spirit, the Sanctifier, so that the offerings may become the body and blood of Christ and that the faithful by receiving them, may themselves become a living offering to God.