The contest is growing exponentially - last time I judged 19 contestors and now it's 27.
Sorry for the delay.
Contest #71. Equestrian Revolution
Create a card (-shaped object) making use of the Horses pile
Farrier (Treasure) by mandioca15
Livery as a Treasure, but unlike Livery, it triggers on cheap buys and gives extra buys itself. When used in numbers, it can grab the whole Horse supply - not sure if it's great or broken
Way of the Zebra by alion8me
Variant Chameleon converting +Cards into +Horses. There must be some infinite loops with it
Horselord by segura
Night gainer might be pretty strong in the setups with cheap cards and +Buys. "Per gained non-Horse card" prevents it from being exponential - neat design trick Short List
Feed by majiponi
Nice little trasher. Probably too slow to deal with junking attacks, but good for keeping the shape of the deck. The only problem is that there is quite a few nice little trashers around. Honorable Mention
Corral by [TP] Inferno
A Treasure that doesn't give any buying power but instead gives an Experiment - this is somewhat worse than Horn of Plenty, but an extra +Buy makes it a reasonable purchase in Buy-poor kingdoms.
Stallion by LibraryAdventurer
Technically it's a double Lab with the third card delayed. The sifting will be done most of the time even if the player doesn't currently hunt for Stallions - to my taste, a dubious rules change.
Farrier by Barbarossa41
Hopefully I've parsed this correctly (with a little reordering): Topdeck a Horse, Gain a Horse and Exile a Horse. This looks overpriced, as a two horses gainer costs $2
Breeder by NoMoreFun
With some skill and luck, this can be used for exponential breeding. I don't know why someone would need all the horses in the world though. Honorable Mention
Equerry by scolapasta
An Artifact tug-of-war similar to Border Guard, but the prizes are modest and even could be negative (Horses stuck in a stolen Corral). Exiling as a payment makes interesting dynamics. Honorable Mention
Community Farm by Aquila
A more flexible Academy which is also a bit of Diadem and a cheap Horse generator. Everyone will build it, but it needs some skill to choose among the alternatives, so I like it. Honorable Mention
Forest Hag by D782802859
Baba Yaga curses the hero but supports him with a good horse. When the curses are over, she is just nice. Probably a little overpriced. Short List
Stallions (pile) by X-tra
This is gorgeous - all those nice stallions in one pile. It's hard to understand the balance; the "single Arabian" clause makes it a little too political in multiplayer games. Short List
Bridle Craftsman by anordinaryman
It will turn the deck into something extremely swingy. This turn it's a Moat, but with the Horse gained it turns into a Lab. Not very manageable without support.
Mail System by MrHiTech
Expensive peddler which only makes sense when overpaid. Mostly useful when your engine stumbled at $7 and needs some grease.
Escaped Foul (ladder) by somekindoftony
"Gain all the Horses" is bold. Unfortunately it deprives the other player from gaining anything, potentially for several turns. I would probably topdeck all the gained Horses similar to Stampede to make some horses escape next turn. Honorable Mention
Horse Meadow by Rhodos
An elegant and thematic Project, similar to Sinister Plot. Everyone would like to buy it, so it should cost $4 or $6 to eliminate the 5/2 advantage. Short List
Farrier/Horseshoes by Optimal_Inefficiency
A smithy with a Horse on gain is interesting by itself, and the Horseshoe makes it even more valuable, especially with no other source of Horses, A trashing option makes this card even more versatile. Honorable Mention
Stable Master by Fragasnap
A desirable non-Gold for villageful engines - very likely to give 5-6 cards in total, but you likely need some cash to get it, and treasures slow it down.
Circus by artless
It's a peddler made of two cards, not unlike Merchant. You need a decent density to make it work, and it is still not very strong.
Racetrack/Abbatoir by BlueHairedMeerkat
Racetrack is a self-crippling terminal silver - topdecking a card from hand is too brutal, doesn't worth the compensation. I doubt someone will ever see Abbatoir.
Horse Farm(er) by spheremonk
Apprentice with a delayed payout, similar to Research. It needs some boost (+Buy?) to be likable
Badlands by spineflu
When one player buys a Badlands it's enormous advantage, like +8 draws per play. Anyone else has to follow the suit just to hobble the opponent's Horses. Without Villages in the kingdom, this will spoil the party for everyone.
Jockey by Supernova888
Feeding the horse with a discard for let it stay is neat and balanced. Honorable Mention
Wrastler by mail-mi
Terminal Silver with a nice delayed cashback. Three horses look just right, taking into account the slowness of the process (two shuffles to use the horse). Honorable Mention
Cowherd by Carline
An ultimate tool for horse management. With a little help of deck control (like Scheme), your Horses will never run away. Sounds pretty strong, but just comparable with a Ferry on labs, so I think it's not extreme. Short List
Tinkerer by Something_Smart
Probably not very strong by itself, this card has a great potential of megaturn combos. So great that it might be broken.
Short List
Horselord, Forest Hag, Stallions (pile), Horse Meadow, Cowherd
Runners Up
Forest Hag by D782802859
Horse Meadow by Rhodos
Winner
Stallions by X-tra