Ainok Caretaker: I doubt Hound tribal's going to be a thing, but if so this is a solid anthem.
Cybele: This feels very good in something midrangey, albeit necessarily nongreen midrange so it's not competing with Snowfield Mother; there's a small instigator glitch with an extra mana symbol there.
Driven to Distraction: This is a weird break, but probably not actually good.
Furtive Witch: This is strong, and might make a flicker deck actually viable.
Herd of Sheep: I think this is weaker than it looks; it's a lot of value but that value's attached to a 1/1 you have to untap with.
Legend of the Devout: If any of the Personas would be playable, it's this one, but I'm really not sold on the mechanic in general. It's an aura mechanic that not only doesn't fix the general problem auras have of opening up 2-for-1s, it also negates the standard (bogles) method of removing that weakness.
Legendweaving: While I'm not surprised it can't fetch gods, that's still very disappointing. That said, this is still effectively a two-mana enchantment tutor at instant speed, which compares favorably to Idyllic Tutor and Search for Precedent.
Radiant Bonds: This is not as good of an answer as the alternatives.
Amateur Pilfering: This replaces Deny the Truth in mill.
Benign Whisper: Hey, it's a Man-o-War. Might be playable in something flickerish.
Braenid Nomad: There's a graphical glitch on instigator with this one.
Buoyant Thoughts: Three mana for four cards is *almost* as good of a rate as green gets. This is presumably good in Seto Control/Mei Valentine/Arina Control and similar decks.
Clever Rejoinder: Now that's a card for the control mirror, or for tempo vs control.
Inspiring Journey: Seems suitable for a U/X deck with big threats, like RUG Rock//Roll, or possibly some kind of Bant. Still, it's entirely dependent on the Harvest to be playable; nobody's spending seven mana on three cards.
Legend of the Wayward: See my above comments about personas, with the caveat that you can play this on an already tapped creature as part of some kind of nonsense combo.
Moonlit Hunter: This guy feels worth tossing in some kind of control deck, possibly alongside Gim-Chimya.
Peel from Reality: I don't think anyone's playing this, but this art is strictly better than the Mious and Yakizma arts.
Whisper Witch: This is shockingly close to a blue Chupacabra. While I don't think Loathing/Hate/Malice wants her, there's got to be a blue midrange deck out there for her (possibly with Ardy's Study?).
Witch's Apprentice: This might see play in some kind of blue blitz aggro deck, but I think Lord Rokai is significantly better.
Yuren Lappowen: I think he looks a lot stronger than he is, although he might be playable in some kind of Discordant Bell deck?
Birth of Whispers: This is kind of absurd in terms of the resilience it gives a creature deck, but I'm not convinced it's worth the additional two mana over Chigau. Still, worth watching.
Forced Offering: Dropping this T2 on the play to destroy your opponent's only land is interesting, but the card's weak enough outside that situation I don't think it's playable.
Frailty: This is probably black's best 1-mana instant speed removal spell, with only Glacia's Engrave comparing.
Legend of the Weary: See my above comments about personas.
Lessons Learned: I was very excited until I saw this wasn't actually card advantage. Pass.
Siesa Tremund: I'm going to be testing this in Abzan Ardy's. This seems good.
Small Luxuries: This feels great alongside Lady Gen, Kalemn Weller, and other similar discard outlets, and so feels worthwhile in Loathing/Hate/Malice and maybe Grixis Phoenixes.
A Whisper's Touch: I think the nerf has probably made this irrelevant maindeck, though it's a passable sideboard option against go-wide decks.
Advocate of the Hunt: This is spicy. It synergizes well with the PFP lands, as well as already strong cards like Aguri. I expect this to see a lot of play.
Ainok Alpha: Another anthem for the Hounds deck. This increases my optimism about it significantly, as with Fjorda it can run 12 two-mana anthems.
Ainok Lout: If there's a Hounds deck, this guy's in.
Autumnal Watch: This is probably not great outside of Revert to Moonlight decks, but awesome in them.
Dance of Fire: This isn't Bolt enough for me to want it in most decks, but there's probably a deck for it somewhere.
Latent Potential: Worth testing in RG infect, I think?
Legend of the Brave: See my above comments about personas.
Rush of Wonder: This is almost good card selection, but I think it doesn't quite get there. Man, I miss Impulsive Plan.
Selma Lappowen: Now that's a storm enabler. (The rapport ability's also probably fine in tempo decks of some sort.)
Trinkets and Charms: This feels like something Izzet Blitz might want?
The Witch Queens: You know how I keep saying Big Red almost has enough tools? I think Big Red finally has enough tools.
Ainok Hunter: ANOTHER LORD! Okay, I think sixteen lord Hounds might be worth taking to a skirmish.
Charitable Wisdom: There's got to be something broken to do with this, but I have no idea what.
Cornucopia Crescendo: It's sorcery speed, but close enough to Chord that I think it sees play.
Edith Waunt: She feels like a reasonable threat in decks that want aggressive green one-drops instead of manadorks. So, basically only monogreen Jund (and monogreen Naya, I guess).
Grayce Blaen: Feels like a solid midrange piece, but competes with Tsang Jin and thus will likely see little to no play.
The Last Hunt: This looks very cool but not playable.
Legend of the Generous: See my above comments about personas.
Roads Untraveled: This is probably playable in some deck that uses a lot of enchantments; if there's a green Time Machine deck or something.
Vestiges of Autumn: This looks like it could be playable, but it practice almost certainly isn't.
Desraen, Serpent's Will: Desraen feels almost good, in ways very reminiscent of Kess, but awkwardly doesn't fit in the same kinds of decks Kess would. I think it's a good card with no actual deck to put it in.
Lady Heiffyd: Getting Tamiyo's +1 (sidegrade) on a three mana planeswalker is great. The -4 probably matters occasionally; the ult is irrelevant. She's still good in control, and would be decent in tempo if not for the power duo of Azun and Saigura Tam already taking up the three-drop slot. Maybe if there's an Esper or Bant tempo deck?
Concord of Ravens: Probably not playable in mill.
Scrollsnatcher: This goes into UB Rogues. This is good in UB Rogues.
Blood Harvest: I don't think this is good in this format, but it's got potential. Still, gold cards are not what I want to look to for punishing nonbasic lands.
Twinfire Dragon: This is a control finisher, I think? Or a midrange threat for Jund? This card's too good not to play but I don't know what shell it has.
Spirit of Autumn: This can get very nuts-ish in something like Naya; but the fact that the tokens are white not green limits its use. Still, probably worth testing for those of you who play that style of deck.
Reflect on Serenity: This feels like a plausible engine for an enchantment-based prison deck, possibly Writing Wonders; it doesn't quite fit in Time Machine, I think.
Stormchaser Mage: It isn't relevant in MSEM, where we have Autumm Fae and Master of Tranquility.
Trae, Serpent's Grasp: I don't think the decks that want this effect want it on a three-drop. I could very well be wrong and I'd be excited to see this see play.
Exhausted Farmhand: Despite the vague similarity to Deathrite Shaman, this card is much worse than it looks.
Aelinn: Now that's a good aggressive threat. I will be testing this in some kind of Mardu variant.
Witch of Spring's Promise: This is great filtration, plus very silly synergies with archives (especially Ardy's). I will be testing this in some kind of Ardy's deck, probably BUG.
Expedition Map: Hey, more redundancy for land-tutoring effects for Tron.
Lumber Camp: This... might be a relevant engine for something? I think it's too slow for GP use.
Blundering Clocktower: I think this is a prison piece?
Cumulus Horizon cycle: Canon painlands are worse than PFP painlands, generally, so I don't think these see any play.
Moon of the Final Dawn cycle: I don't think these are playable, but since they're fetchable I could see them showing up as one-ofs in decks that need lategame filtration.
White: Furtive Witch
Blue: Buoyant Thoughts
Red: Advocate of the Hunt
Green: Cornucopia Crescendo
Gold: Lady Heiffyd
Artifact: Uh... Expedition Map, I guess? None of these are playable.
Land: Moon of the Final Dawn cycle is fetchable and so I guess might be relevant.
Sideboard: Clever Rejoinder is amazing tech against control.
Command Zone: Desraen, Serpent's Will may not have a functioning shell for 60 cards, but you better believe she can helm a Brawl or Commander deck.