[peopleoftheway]

That sounds like a catholic mass, where they used the Eucharist, the belief that the consecrated wafer and wine are miraculously changed into the actual body and blood of Jesus in a process they call transubstantiation.

1413. By the consecration the transubstantiation of the bread and wine into the Body and Blood of Christ is brought about. Under the consecrated species of bread and wine Christ himself, living and glorious, is present in a true, real, and substantial manner: his Body and his Blood, with his soul and his divinity [cf. Council of Trent: DS 1640; 1651.].--" Catechism of the Catholic Church (CCC); (C) 1994/1997 United States Catholic Conference, Inc.