The Priests version of Ram's Horn has the text of Joshua 6:5. but the reference Exodus 6:5. It is listed on the wiki as a card from Exodus. Although this isn't a special ability, it is an obvious error.
I had noticed that, as I am currently working on a Play As/Errata Update project. One of the issues I am going to bring up is Scripture reference errors, and whether they need/should have errata.
Other interesting errors I've found (or have been long known) are:
Goliath and Eli's Sound Advice have references from I Sammuel
Courage (from the original set) has a reference from Duet., which would be an abbreviation for Deuteronomy, except it should be Deut.
Kidron Valley has a reference from II Chronicales
One of the armor of God enhancements (I think it's the original Shield of Faith, but not sure) has a reference from Ephesians 16 (no putting that on Saint of Virtue!).
Obedience of Noah (Limited) has a reference of Genesis 6:2, which is regarding the Nephilim, rather than the actual reference of Genesis 6:22.
Currently there is no functional difference between an Exodus Artifact or a Joshua Artifact for gameplay reasons, but I think it will still get errata eventually once my project is complete.