That's simply wrong theology because with the death and resurrection of Jesus, God eliminated the sacrificial system.
In Christ Jesus, sin and death were conquered once for all.
Romans 8:1-2 There is therefore now no condemnation to those who are in Christ Jesus, who do not walk according to the flesh, but according to the Spirit.
Any teaching that denies the efficacy of the work of Christ on the cross is from the enemy. That apparition stated something that contradicts Scripture
Therefore, it's safe to conclude that it's demonic in origin.
It is biblical to pray for the dead.
You just have an incomplete Bible.
Check out Maccabees. — It’s there!
BTW...good pickup on the part of no one to pray for make sacrifices for them.
You're right..In Christ Jesus, sin and death were conquered once for all.He is THE SACRIFICE.