Alright, I'm going to throw some more ideas out there.
Enlightened Tutor - a visual reference to the scrolls and scriptures that dominates orthodox Judaism (of which Christ lived in)
Gwafa Hazid, Profiteer/
Dark Confidant - to represent Judas, who sold out Christ for 33 pieces of silver.
Cultivate - multiple representations, but I'd settle on the fact that farming was a typical profession in ancient times and also of the effect during the Millenium, when the land will overflow with milk and honey.
Heroic Intervention - pretty obvious representation of many miracles in the Bible.
Eternal Witness - because evangelism is AKA witnessing.
Birds of Paradise - to represent the dove that Noah released from the ark to find dry land after the Flood.
Golos, Tireless Pilgrim - to represent Paul, possibly the most well-traveled and dedicated Christian missionary of all-time.
Swords to Plowshares - a phrase directly from the Bible and representative of the change that Christianity brings in true Disciples.
Wrath of God - because yeah.
Austere Command - the Old Testament seems very harsh, and this card definitely captures that feeling while also being practicle.
Hour of Revelation - pretty obvious in my mind, but definitely a powerful reminder of the Rapture, the one of the first signs of the End of Times.
Damnation - because duh.
Supreme Verdict - another great Wrath effect that fits with Christ's omnipotence.
Rhystic Study - while Christ's young adult life and childhood isn't explicitly explored in canonical sources, Jewish upbringing included a heavy emphasis on learning the Torah and the Pentatuech. This card captures that flavor perfectly while also being good.
Dockside Extortionist - to represent the money-exchangers that infested the Temple before Christ cleansed it.
Shalai, Voice of Plenty - to represent an Archangel, maybe Raphael?
Last Word - Christ's word as arbiter is final.
Worldly Tutor - Christ's parables came from his excellent understanding of the natural world around him, so this represents the learning he doubtlessly underwent.
Anguished Unmaking - I believe in Christ's merciful nature, and think this is a pretty good representation of the feelings he will have at the Final Judgment.
Fire Covenant - a representation of when Jehovah promised to be a pillar of fire by night to the Israelites as they wandered the wilderness.
Scheming Symmetry - another representation of Judas's betrayal.
Smothering Tithe - unlawful usury and tithes for nearly everything was a corrupt practice that existed during Christ's time, a legit reason for Christ denouncing the Pharisees and Sadducees as hypocrites.
Farseek - representation of when Jesus was carried into Egypt as a child to escape persecution from Herod (I think? can't remember the exact details here).
Council's Judgment - a representation of the corrupt excuse of a trial that Christ received as part of Judas's betrayal.
Happily Ever After - because this is an awesome card of the hopeful and happy promise of the Gospel.
Mayhem Devil - a representation of the various devils and demons Christ cast out during his ministry.
Isochron Scepter - an excellent representation of the scepter that Christ will wield as King of Kings.
Dramatic Reversal - yeah, I'd call the Resurrection a pretty dramatic reversal!
A good combo line that you could include would be
Dockside Extortionist +
Mayhem Devil +
Kenrith, the Returned King. Your opponents need to have a collective 5 artifacts and/or enchantments between them in order for this combo to work. Sac 5 of the treasures for
B. Mayhem Devil sees 5 permanents getting sacc'ed. Use 2 of the triggers to kill the Extortionist, putting it in the 'yard, and the other 3 triggers to deal damage to each of your opponents.. Use the 5 black mana to resurrect the Extortionist via Kenrith's last ability. Rinse and repeat until they're all dead.
And of course Dramatic Scepter is a well-known Combo commodity at this point.
I hope this helps you get some inspiration!