IV. The Liturgical Celebration of the Eucharist

From The Catechism of the Catholic Church

1353
In the
epiclesis, the Church asks the Father to send his Holy Spirit (or the power of
his blessing¹⁷⁸) on the bread and wine, so that by his power they may
become the body and blood of Jesus Christ and so that those who take part in
the Eucharist may be one body and one spirit (some liturgical traditions put
the epiclesis after the anamnesis).
In the institution narrative, the power of the words and the action of Christ,
and the power of the Holy Spirit, make sacramentally present under the species
of bread and wine Christ’s body and blood, his sacrifice offered on the cross
once for all.

PART TWO: THE CELEBRATION OF THE CHRISTIAN MYSTERY

SECTION TWO THE SEVEN SACRAMENTS OF THE CHURCH
- CHAPTER ONE THE SACRAMENTS OF CHRISTIAN INITIATION
  - Article 3 THE SACRAMENT OF THE EUCHARIST
    - IV. The Liturgical Celebration of the Eucharist

From The Catechism of the Catholic Church – rosary.team