The last part of the offertory resembles an anaphora: after a dialogue, the priest blesses the congregation and proclaims a prayer of thanksgiving, giving thanks to God for his support to us, and asking him for a worthy participation to the liturgy. Then comes the prayer of covering said inaudibly by the priest, which has the form of an epiclesis asking God to show his face on the gifts, and to change them in order that the bread and wine may became the Body and Blood of Christ. This text might come from an ancient anaphora or simply be a later High Middle Ages creation. The paten and the ark with the chalice inside are here covered with a veil.