I made a Teysa Karlov deck that was a back door into playing Teshar, Ancestor's Apostle + Black. The deck was noticeably really cheap CMC wise outside of the couple rocks I am missing (Mana Crypt, Lion's Eye Diamond, Mox Opal, Mox Diamond) so I including all the usual black cards including Ad Nauseam. Teysa seemed like a card that didn't really do anything or was a win-more in the Commander slot so as a whim I decided to try out Kambal, Consul of Allocation in her spot and he worked like a charm. He comes out early and in most games he will do a lot of draining early on which also helps when the deck does eventually go for a big Nauseam.
So I took that list I played and decided to see how much I could flatten the curve and increase the early disruption to see how far it could be pushed. Now I know straight Orhzov is not generally considered a thing at these tables and the easy temptations of Esper, Mardu and Junk are right around the corners (This will probably lead to me making a Vial Smasher the Fierce / Tymna the Weaver someday) but I really like how this deck plays and don't mind if it isn't necessarily the fastest it can be.
I did Vampiric Tutor a Reanimate with Yawgmoth's Will active to recast Ad Nauseam to Reanimate Children of Korlis and have enough life at that point to close the game with an Aetherflux Reservoir
Here is the decklist as it stands right now:
One big thing with the deck is that when you have Yawgmoth's Will active the entire Teshar plan of attack is turned off during your turn.
Thanks for taking a look curious at possible suggestions.