If you were in white or blue Soul Summons or Ethereal Ambush would do a lot with the landcyclers. Teach by Example would offer a way to copy thunder which is cool.

Regular cycling would offer wrath at instant speed, but I'm not sure that's great. Burning Prophet is interesting, as it both likes the recycling and bolt/wrath. A single Spore Frog in the side will make some opponents quit as you become fog tribal. You can achieve a similar effect with Stone Rain and friends against decks that need lands.

Warped Landscape and Ash Barrens give access to shuffle despite being lands and not forcing a shuffle if you can manage the colourless mana.

I was expecting a New Perspectives combo list, but pleasantly surprised. It can still storm off with paradigm shift, but the spread into reanimation and value gives the list some reach.

You could probably dip a little more into cycling lands if you used the basic landcycling cards, even though they aren't great, or cut lands with Street Wraith type stuff, but I can't say that is exactly better than whats here.

The only thing I'd look at dipping into is Cloud of Faeries as a combo option, or Gilded Light as a cheap 'not this turn' combo break.

I was half expecting Solemnity to go alongside the Out of Time, but this feels more reliable than those shenanigans.

I think I've found something - you can do a pretty good Summer Bloom impression with just the fetches, except it plays from the deck, so Amulet of Vigor and Primeval Titan have a new way to get the insane tempo they had pre-bans.

It won't like like traditional primetime - the double white cost and fetchland demands massively changes the manabase, but the heart of the engine would work, and you'd get the option of also opening up combos with brought back/lotus field with only a few card slots.

If you want judge/denizen to be more reliable, you can grab some Oran-Rief, the Vastwood or lean into spells running Hall of Oracles/Inspiring Call. There are some great budget counters cards in the 1 mana slot - Experiment One, Generous Visitor, Willow Geist etc. Mutant's Prey offers light removal and Servant of the Scale/Swarm Shambler some survivability.

Other sources of cardraw exist - Brainstone is notable, as is Harmonize.

Flagstones/brought back is neat.

I feel like this could be a really powerful engine. Brought back is already very close to being a combo - getting to put Spore Frog and Eternal Witness in the sideboard and sometimes just straight up winning off that alone is nice.

Maybe look at Saffi Eriksdotter combo lists? Roiling Regrowth/Springbloom Druid as extra (bad) harrow copies? Knight of the Reliquary/Elvish Reclaimer for utility lands?

There is definitely something strong here - there are too many good cards without homes that suit this.

I like the idea - this looks mostly like a jeskai control list to my eyes, and could reasonably be built to one of their slow win setups. All told, if you just look for flat upgrades you can take this a long way, especially if you tweak the focus a little.

I reccomend focusing budget on land upgrades - there are incredible budget spell options, but budget land options are far, far rarer. Grab whatever good lands rotate out of standard, replacing the taplands.

Dodging Path to Exile and Blood Moon type effects matter a lot, as do untapped lands in making decks run reliably - going to 5 basic lands instead of the guildgate isn't going to hurt more than the taplands and will help make sure you can counterspell on turn two. If you must stick with a tapland, Prairie Stream is cheap and can come in untapped, Irrigated Farmland has card draw and land types that matter, while Jwari Disruption  ^Flip can catch someone out turn two in a land heavy hand.

Once you have an idea of how much budget you want to sink into lands the rest becomes easier to plot.

I'd look at Myth Realized instead of ugin's, as its a lot harder to kill, gives a turn 1 play, and likes all the noncreature spells in the list. I feel its the simplest 'flat upgrade' to the list.

Counterspell is a format staple, and does almost everything that mana leak does in this list.

If you want to use ionize and mindswipe, you want to run effects that care about damage dealt, or force your opponent to a low life total first. Paying an extra mana or two for their effects is a serious cost that needs payoff.

The aggressive version would be Delver of Secrets  ^Flip style, a 'combo' version where you tick up Quest for Pure Flame is an option, as is an Aria of Flame type 'slow' wincon (which would also serve as backup creature removal).

On the note of creature removal, you are a little light. Jeskai control often ran Lightning Helix just so it doesn't die to people playing Goblin Guide on turn one. You might not want it maindeck, but planning out a 15 card sideboard should give you space to grab answers like that - with your maindeck answering combo with rule of law and control with a mirror match, you have a lot of space in the side for aggro answers.

Biggest question - how competitive do you want to be? Cause there are great sacrifice cards and effects for competitive play that just shouldn't mix with things on a more fun casual level.

On the competitive end, I'd look at CMC 1 and two, with a focus on card advantage and disruption; Bomat Courier for refilling the hand, Cabal Therapist as ersatz thoughtsieze, Carrion Feeder and Ravenous Squirrel as a chunky creature and repeatable sac outlet, cards like Dockside Chef as extra squirrel copies, there are a lot of really good options.

The hard part is what you are trying to sacrifice - cards that like being in the graveyard and come back tend to get pricy, meaning that you'll probably get more from token value - Mogg War Marshal is about the best budget option, but even there its only 3 triggers for two mana. An artifacts matter list is an option - bomat courier, Glaze Fiend, the dog from the new set and so on would let you run Oni-Cult Anvil or Pia's Revolution for a lot of value, while also taking advantage of treasure, blood food and other 'artifact tokens' as they are printed.

Young Pyromancer is a classic for a reason, but it does need instants and sorceries - more value from Dragon Fodder, but less from return from graveyard effects.

All told, a lot of it is about the kind of deck you want to build. All in elemental awakener is great, trying to loop changelings with awakener and stuff like Prowess of the Fair is hilarious if you want to go that route too.

Myr retriever has several other options if you're looking to combo - Semblance Anvil+sac outlet, Scrap Trawler/Workshop Assistant as alternative options, or even backup combos that generate gravestorm (flavours of persist/undying).

I've found the combos taken as a group to be reliable because they all share pieces - the battle is packing protection for the graveyard itself and surviving to cast it. Going into black/green and playing a lot of thoughtsieze seems like it has a good chance of that, especially with a grindy backup plan.

In theory playing Painter's Servant and Spellskite for free could set up something big, but I haven't found a way to make that really tick over. I've also thought about creatures with 1 toughness and a death trigger to try and get to high gravestorm - fecundity+heartless and Hangarback/myr sire is a draw two. Still fragile though. Best of luck with the brewing - I hope you figure this one out.

The only must haves in precons are sol ring/signet/tower, and you already have those. Its more about what you like to play than what should be played once you have land search+mana fixing.

Buying singles is almost always cheaper and gets a better result overall.

Reasons not to to do singles - it can be hard to find awkward cards and get them shipped, and shipping costs can tilt things the other way if you need multiple senders.

You can load the deck into here with a copy paste like this to get an idea of the cards and prices.

The deep sea stuff has had a lot printed over the years. If you set CMC to >6 and ask for a blue creature, you'll see a lot of options from Octavia, Living Thesis to Aethersquall Ancient, its all fairly inexpensive and good for commander. There are some decent ones with hexproof/shroud/return to hand if you're tired of them getting hit by condemn and whatnot.

Lands wrath has a fairly solid spine to build on - its mostly search basic so adding islands is simple. You might want to flesh that out with more Cultivate effects and whatnot if you have trouble ramping, but thats about it.

Personally, I'd go for a spells and creature tokens landfall deck, grabbing stuff like Urban Evolution Eureka Moment, Growth Spiral and some creatures like Zimone, Quandrix Prodigy before grabbing bigger stuff like Guile or Liege of the Tangle. But I like drawing cards to make up for less big spells, and sometimes just more big cards does better.