***The same way He sheds His Blood at every Mass.***
LotI, this is not true according to Hebrews...
"And every priest stands ministering daily and offering repeatedly the same sacrifices, which can never take away sins. But this Man, after He had offered one sacrifice for sins forever, sat down at the right hand of God... For by one offering He has perfected forever those who are being sanctified." - Heb 13
"After" he offered his sacrifice (Past tense) he sat down at God's right hand (present state).
Please note the reference to the "repeatedly" offering a sacrifice in direct contract to Jesus' "one time" offering.
Again...
"Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God." - Heb 12
He endured (not endures) the cross and the shame for the joy he looked forward to (and now experiences) at God's right hand.
And every priest indeed standeth daily ministering and often offering the same sacrifices which can never take away sins. But this man, offering one sacrifice for sins, for ever sitteth on the right hand of God, From henceforth expecting until his enemies be made his footstool. For by one oblation he hath perfected for ever them that are sanctified. (Douay-Rheims Heb 10:11-14)
But this man offering one sacrifice for sins, for evermore sitteth in the right half of God the Father [for evermore sitteth on the right half of God the Father]; (Wycliffe New Testament Heb 10:12)
"offering" is also the reading of the Vulgate, but the Nova Vulgata has "having offered".
You are absolutely right. The amount of mysticism in the Roman Catholic Church amazes me. That is the danger of avoiding sola scriptura. There is no objective standard by which these ideas can be measured.