This is a submission for Day[9]'s "What the Deck"

 Here is some praise I have actually* recieved!

"Copying Anointed Procession gets exponentially better as you do it more, as long as your copies are tokens!" - Me
"Flying horsies!" - Some Young Kid
"What is this garbage?" - Random Deck Reviewer

 (*this is a joke)

You may be saying to yourself: "This deck is bad. Neigh, I would go so far as to say it's worse than bad! It's horse-s***!" but hold your horses! This isn't designed to be competitive. It's a fun deck! So get off your high horse and humor the horseplay for a bit, yea? 

The big synergy revolves around ~3 cards, sometimes also needing an instant/sorcery you can target your own stuff with (i.e. every one of them in here except opt). Copying Anointed Procession ("once") triggers the ability of Archon of Sun's Grace twice and octuples the tokens that the ability makes from each trigger, for 16 Pegasus tokens. There's essentially 8 Anointed Procession cards in the deck (from Idyllic Tutor searching it), and there are 8 cards that let you copy Procession (that is, Orvar, the All-Form (with help), and Mythos of Illuna).

For the memes!

I also threw in just one Rhys the Redeemed for maximum meme potential; because, imagine this:
You copy a Procession with Mythos. You do this while you have an Archon and Orvar out, and have Rhys ready to activate.

So, first a copy comes out from Orvar's ability, except it's not one copy, it's two copies because Procession doubles them. This makes the Archon create a Pegasus, except it's not one Pegasus, it's 16 Pegasuses^(?), because now there's 3 Processions, and two of them just entered the battlefield. Then the Mythos resolves and creates another copy of Procession... except it's not one copy, it's 8 copies, for an additional 8 triggers, now with 11 total Processions out-- this means you get 2^11 more Pegasi^(?). Except that happens 8 times, which bumps that 2^11 up to 2^14 in total, or 16384. So now you're up to 16 + 16384 = 16400 Pegases^(?).

But let's go further. Since you have reached the fabled Maximum Meme Potential of the deck, and can activate Rhys' ability, that means each of the 16400 Pegasusses^(?) is going to create 2048 (2^11) more Pegasus^(?) for a grand total of (16400 * 2048) + 16400 = 33,603,600 Pegasues^(?). Created from 10 mana in one turn, out of 5 cards, with no infinite combo involved. (Yea, I know, 5 cards is a lot for a combo in MTG)
Note: The setup for this would cost 13 total mana, 4 cards, but doing it in the right order would also pre-create 2 Pegas-Sus^(?) beforehand which would increase your total to 33,607,698 tokens after Rhys.

Sure, all that ridiculous meme potential might only happen after some serious horsing around, (and this might crash the game because of the 16400 or more triggers on the stack each adding 2048 tokens to the board), but still! That's thirty-three million flying horsies! We're talking so many flying horsies that they'd realistically be crashing into each other more than they could do anything productive on a battlefield!

But back to reality...

Often, you can just get a neat 16+ Pepegasussers^(?) pretty easily from combining 3 cards which you run a lot of (only one you don't see all the time is gonna be the Archon)... and if you don't get your Archons, you can still have fun duplicating Processions either just from the silly fact that you're copying something just so that you get more copies of it per time you copy it, or from the more practical aspect of your other token creators, such as Orvar, or Castle Ardenvale.

In any case, the deck does have things it can do without all your combo pieces --
Orvar can let you duplicate ANY permanent you have via Aether Tradewinds (I got some value in one game by duplicating Gates of Istfell).
Procession gets a TON of value when you get a good pick off your opponent's best permanent via Mythos of Illuna.
Orvar gets lifesteal off of your Archons because Orvar is a changeling.
Flicker of Fate can cycle itself off Cloudkin Seer.

Basically, there's just a lot of random synergy to be found.

I tested a version of the deck with some small changes (including no Rhys), and much worse lands; it was pretty fun when I went against some of the more tame opponents. One time I lost from my opponent having (two) Revenge of Ravens since I made like 400 tokens at once and didn't bother thinking through the turn to attack with just 9 creatures; it was pretty hilarious. Another time I won through my opponent's destruction of my combo pieces just because I copied their pirate Vraska and got twice as many pirate tokens out of her as my opponent did (before they killed my Procession with their own Vraska).