In light of her effectiveness against Witch's Oven, Cauldron Familiar, Edgewall Innkeeper, Knight of the Ebon Legion, and other one-drops, and an appreciation for just how well-designed of a three-drop Planeswalker she is, I've built a deck around Kaya, Orzhov Usurper which may as well be called a Kaya Tribal deck with playsets of Oath of Kaya and Kaya's Wrath and even an experimental Kaya's Ghostform for insurance or even redoubling of the combo pieces. I've seen an Esper Control build which uses Ashiok to fill the opponent's exile for a 1-hit from Kaya's ultimate, but I thought I'd try tightening up an thematically-appropriate Orzhov build. Looking to add reliability to a color pair with limited draw options, I found the Doom Foretold Control shell with the two-mana cantrips and a full set of Oath of Kaya appropriate. The cantrips, along with a lack of six-drops or Dance of the Manse, also allows for far fewer lands than is normal for Orzhov/Esper Control.
The playstyle is mostly normal for Orzhov Control, but it remains to be seen how well this finisher can compete with the normal Liliana, Ugin, and Command the Dreadhorde pieces; The usefulness of Kaya against Witch's Oven and other one-drops probably won't be worth it for matchups against various Fires of Invention, Wilderness Reclamation, and control builds, so at present I'm only considering this a science project. Kaya's Ghostform is almost unheard-of, but it protects not only against a hit of Murderous Rider, but also exile effects, and if they're not in as much danger, it can also let you redouble your uses of an Ashiok. The Elderspell can be used on your own Ashiok to let Kaya use her ultimate the turn she comes down. I'm currently trying Bontu as a durable 1-of alternate win condition, but it should be noted that Cavalier of Dawn does very well as a 2- or 3-of in Doom Foretold builds, as the sac fodder synergizes with both its Golem and death effects, it's normally essential when Kaya and Ashiok aren't using space.
