Your question, "how does one eat Christ's flesh and drink His blood (without which there is no life in you) apart from the Eucharist?" was so offensive to God's word that I needed all the support I could muster. Did you read the Westminster on the Lord's Supper? It's 100% Scriptural.
I was going to give you Calvin's take on the abomination of the mass, but I thought the kinder gentler admonishments from the Scripturally-based Westminster would be more gracious.
Did you read the Westminster on the Lord's Supper? It's 100% Scriptural. No, if it were 100% Scriptural, it would be Scripture. What part do you want me to read, and why should I consider it authoritative?