Along came War and along came changes to my Orzhov I've had so much luck on the ladder with. This is every bit as good and more than likely way better, I just need some more runs with it to give it an intelligent grade.
Fun as hell anyway

1 x Kaya, Bane of the Dead
3 x Basilica Bell-Haunt
3 x Dauntless Bodyguard
3 x Knight of Malice
2 x Ajani, Adversary of Tyrants
2 x Kaya, Orzhov Usurper
2 x Cast Down
3 x Mortify
3 x History of Benalia
5 x Swamp
6 x Plains
4 x Godless Shrine
4 x Isolated Chapel
1 x Swamp
2 x Vraska's Contempt
4 x Tithe Taker
2 x Kaya's Wrath
2 x The Elderspell
2 x Massacre Girl
2 x Sorin, Vengeful Bloodlord
2 x Ob Nixilis, the Hate-Twisted
2 x Interplanar Beacon

Weird deck, I can't imagine not running 4x History, and you have so many unusual cards too (like Oath of Kaya and Kaya's Wrath) in a deck with 1-drops ... are you trying to be an aggro deck?

Ob Nixilis as well as 6-mana Kaya are weird as well - would not have thought they are constructed playable, and would be much more inclined to play something like Seraph of the Scales.

Took out 6 mana Kaya. Not worth it in the deck. Not very constructed playable, yes. I actually took a History out of the deck to accommodate more PWs.
It's not really an aggro deck but if I'm feeling jaunty the Bodyguards could come out t1 and start doing some decent fast aggro. They are really in as protection and knights. Oath of Kaya has turned out to be really, really good. I've won a few games strictly on its back. Ob I've been giving second thoughts to. I'd rather have more Sorin of which I think I have one more now and could sub it in.
Wrath is a panic button that works well with Bodyguard. Seraph is still a great idea but at the time of building I still did not own any. I do have some wilds now and I agree with you that I think their inclusion for Ob is the way to go. The pre War version of the deck got me swiftly through gold and the new version is doing the same thing.

Example of why I more than likely will keep Ob in.
Ping them every turn. Took out their sole Bell-Haunt blocker so I could rid myself of their old Teferi and pinged them more for drawing.
Yes, I understand his possibly devastating down side but I think he works really well in this deck. The deck is on a roll tonight. Constucted Event, three games (RDW, Rakdos Good Stuff and Weird Creature Esper, now with more Teferi! (I took out two in that game down there)), three wins.