Some views how the sacrament of communion is processed.
the view that the bread and wine actually become the body and blood of Christ
The Roman Catholic Church holds this view. The reformers took the view that this was a re-sacrifice of God, therefor it is in error. In fact: many reforming pastors were killed for opposing this view.
the view that the bread and wine become the spiritual body and blood of Christ
Many traditions hold this view. A problem with this view is the magical nature of the bread and wine.
the modern evangelical/confessional view is the bread and wine are simply a reminder.
Church leaders all agree that communion should be taken seriously. This view highlights the remembrance aspect of the ceremony. i.e. the very visceral act of eating and drinking correlated with the somberness of the Biblical message of Christ’s sacrifice.
What does scripture say about the nature of the bread and wine?
John 6 1 Corinthians 11
Bread/Manna Numbers 11
Blood Exodus 12