A little thought experiment for now in regards to a new deck idea I have, and I want to check wether I got anything wrong to make it not work. So here's the idea:
I have Kaya, Intangible Slayer on the field, equipped with Luxior, Giada's Gift. I also control Oath of Teferi. Now I should be able to use Kaya's -3 ability to exile herself and get a Kaya token that's also a 1/1 creature. Which can then do that again to itself, and so on. The Oath allows me to use the +2 beforehand in each iteration to drain my opponent out of the game, because while Luxior makes Kaya not a planeswalker, the token will be one. Correct?
A Standard variant of that idea would have me get the Kaya-Luxior combo together with Mondrak, Glory Dominus and Ratadrabik of Urborg for basically the same thing: one token for the token loop, and another for the drain. That should also work, right?
The loops you describe work. With the help of Luxior, Kaya and Ratadrabik's token-making abilities can keep making new Kayas indefinitely. While I *technically* shouldn't be giving you deckbuilding advice here, I'll prevent someone else from spamming by doing it: to assemble a game-winning combo, you can replace Mondrak/Ratadrabik or Oath of Teferi with a number of things that trigger when a creature or planeswalker enters or leaves the battlefield, and such effects are more common (though probably less cool and unique to you).
I'm a former judge (lapsed), who keeps up to date on rules and policy. Keep in mind that judges' answers aren't necessarily more valid than those of people who aren't judges; what matters is we can quote the rules to back up our answers. When in doubt, ask for such quotes.
Kaya, if it is a creature due to Luxior, is a legal target of Kaya's [-3] loyalty ability. (And it is.) So then you get a token which is a copy of {the permanent that Kaya was}, and it is a Spirit creature in addition to those types, and it is 1/1 and white. It has flying. Since the token copies the Kaya, it has the loyalty characteristic of 6 (rulings for Jace, Cunning Castaway), and enters with those loyalty counters. (CR 306.5b)
Since it is a planeswalker and a copy of Kaya, it has the [+2] ability and it has the [-3] ability. You can activate both because of the Oath.
After that, making a token copy of a token made this way yields a creature planeswalker, because those types form copiable values of the token; and the loyalty of the token will still be 6 as it enters the battlefield.
Each such token also satisfies that it is targetable by its own [-3] ability, and the copies have the [+2] and [+3] [-3] abilities, and you can activate both.
I have Kaya, Intangible Slayer on the field, equipped with Luxior, Giada's Gift. I also control Oath of Teferi. Now I should be able to use Kaya's -3 ability to exile herself and get a Kaya token that's also a 1/1 creature. Which can then do that again to itself, and so on. The Oath allows me to use the +2 beforehand in each iteration to drain my opponent out of the game, because while Luxior makes Kaya not a planeswalker, the token will be one. Correct?
A Standard variant of that idea would have me get the Kaya-Luxior combo together with Mondrak, Glory Dominus and Ratadrabik of Urborg for basically the same thing: one token for the token loop, and another for the drain. That should also work, right?
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Since it is a planeswalker and a copy of Kaya, it has the [+2] ability and it has the [-3] ability. You can activate both because of the Oath.
After that, making a token copy of a token made this way yields a creature planeswalker, because those types form copiable values of the token; and the loyalty of the token will still be 6 as it enters the battlefield.
Each such token also satisfies that it is targetable by its own [-3] ability, and the copies have the [+2] and
[+3][-3] abilities, and you can activate both.Awesome avatar provided by Krashbot @ [Epic Graphics].