and so you suspect something spiritual in the Last Supper ritual? (catholic mass)
Catholic? Yes.
Was it his "last" supper? He ate with them after he arose.
Read these words:
Some are afraid lest they rise naked. Because of this they wish to rise in the flesh, and they do not know that it is those who wear the flesh who are naked. It is those who [...] to unclothe themselves who are not naked. "Flesh and blood shall not inherit the kingdom of God" (1 Co 15:50). What is this which will not inherit? This which is on us. But what is this, too, which will inherit? It is that which belongs to Jesus and his blood. Because of this he said "He who shall not eat my flesh and drink my blood has not life in him" (Jn 6:53). What is it?
His flesh is the word, and his blood is the Holy Spirit.
He who has received these has food and he has drink and clothing. I find fault with the others who say that it will not rise. Then both of them are at fault. You say that the flesh will not rise. But tell me what will rise, that we may honor you. You say the Spirit in the flesh, and it is also this light in the flesh. (But) this too is a matter which is in the flesh, for whatever you shall say, you say nothing outside the flesh. It is necessary to rise in this flesh, since everything exists in it. In this world, those who put on garments are better than the garments. In the Kingdom of Heaven, the garments are better than those that put them on.- Gospel of Philip
If wafers and wine did something, everyone can do that. Christ said his words are "spirit" and the flesh profits "nothing" John 6.
So what profits the Eucharist if it's a ritual of flesh? Jesus never taught flesh rituals. The water does nothing at a baptism. If it did, how can one become baptized in the desert? Wait for the water?
The RCC were "robbers and thieves". Just as the early fathers were. John 10:8
Fleshly rituals does nothing.