I think it's obscure, but pretty shallow. Shelkin Brownie removes the "bands with other" ability, and this post makes that a parallel with a hypothetical "partner with other" ability.

Obligatory yet interesting trivia: The "bands with other" is the benchmark for incomprehensible and pointless mechanics. No tournament-legal card natively has it; it only appears on tokens from Master of the Wild Hunt and the land cycle that FormOverFunction mentions. Old Fogey is an Un-card that has it, too. Despite the limited and restrictive usage, it received two dedicated hosers in Shelkin Brownie and Tolaria. So that covers the "pointless" part. The "incomprehensible" part comes from the rules text description. Banding by itself is a combat ability that changes based on whether you're attacking or defending. The basic summary is that you can group creatures together and decide how combat damage gets assigned, but evasion abilities become less relevant. "Bands with other" modifies how the band creation process works.

Kţ∑∫∑þar would be pronounced something like Kts-Ss-Sthar.

(o)mŋiπ∫ŧţπ is something like u(r)hm-ng-ipsth-thp. The first letter (not transcribing for me) is basically the vowel of "foot" in a Geordie accent, if you know what that sounds like.

(o)mŋiπ∫ŧţπ

Legendary Enchantment Creature - Avatar

You can't spend mana from permanents to cast this spell.

When (o)mŋiπ∫ŧţπ enters the battlefield, each player shuffles their hand and graveyard into their library, then exiles the top half of their library.

If a player would draw while their library has no cards in it, instead that player doesn't draw.

9/9

Create the delivery of an important package.

Yeah, Attraction cards and Sticker cards got banned from Commander a few days ago. If your group is okay with it, you could keep them, but officially that cards aren't legal and should be switched out.

Starting the hub inventory, I don't see any of the keywords or mechanics from MKM or OTJ: disguise, case, suspect, plot, spree, outlaw, mount, and commit a crime are all missing. Gate, battle, stickers, and attractions are also missing, as mentioned above, along with historic, performer, clown, employee and guest. (Stickers and attractions might fall off after the last round of bans.) I'm happy to add them manually, but if it's supposed to be auto-creating, it's being pretty slow about it.

Would Undercity fall into Venture into the Dungeon, or is it distinct enough to be its own mechanic?

TypicalTimmy for the acidomancy, may I suggest corrosimancer? Based on corrosion/corrosive. If this magical art isn't just used for fighting, but also used to clean bathtubs with the power of neutralizing reactions and make everything taste better with phenolic acids, maybe chemister would work. If you want to avoid just calling it chemistry, there's chemisturge and chemisturgy.

Anyway,

Mint Gel

Creature - Food Ooze

Flash

Whenever a Food enters the battlefield, prevent all noncombat damage that would be dealt by other creatures this turn.

2/2

A fresh cooling sensation, followed by an inability to stand upright.

Create a card with the phrase "If a player would sacrifice a land,..."

Unlucky Streak

Sorcery

Look at the top three cards of each player's library. Put any number of them into their owner's graveyard and the rest on top of their owner's library in any order.

Miracle

"It's not your fault. Sometimes everything just goes wrong."

Black miracle chaining FTW!

Create a multicolor Miracle.

I'm going to work on hub inventory in the very near future, so I'll see what's going on with those hubs.

Kind of disappointing that Horde Magic doesn't get any love... There's a handful of genuine Horde Magic format decks, but yeah, it's overwhelmingly misused. I'd like to think it would survive better as one of the niche format options.

I promise I'm not trying to be too petty re:Horde Magic, but formats like Heirloom and Noble don't seem to have even any legal cards, let alone legal decks. I just quickly skimmed some formats I didn't recognize, and those two stood out as having apparently no interaction on this site in over a decade, filled entirely with bright red decklists.

Trying to be proactive instead of just complaining, is there a way to remove or disable some of the little-used formats, and would anyone be upset if the format options were cleaned up?

Thanks for the reminder. Planning to fully catch up on this by the weekend. If you find anything else that could be a hub, post it and I'll check it out.

Would it be possible to change Horde Magic from a hub to a format? I know that the focus on tokens makes it weird, and maybe not viable, but it's much more of a unique deckbuilding and playing system than a strategy or archetype.

Thanks for these updates and new inclusions!

Final Preparations

Sorcery

Draw two cards. Put a +1/+1 counter on each of up to two target creatures.

Fateful hour - If you have five or less life, for each of up to two creatures, put a vigilance counter or a hexproof counter on that creature.

"Once we step down, there's no way to get back. We can only go forward. Make sure you have everything you need and nothing you don't."

Create a juggler. Bonus points if it's a goblin. More bonus points if it's actually a group of goblins.

Last_Laugh Double Trigger has been added. I'm going to review it for usage consistency once it's been up for a while, to make sure it's being applied correctly.

000CBomb000 I should be able to look into the 93/94 decks later this week. The last four weeks have been insane for me, but once I get everything in my life finished and locked in, I should have plenty of time.

Surreal Scenery

(no cost, green-blue-red color indicator)

Sorcery

Whenever you cast an instant during your upkeep, remove a time counter from Surreal Scenery.

Tap target land, then add one mana of any color that that land could produce.

Storm

Suspend 7

Create a card that can change who controls it.

Last_Laugh Huge apologies, I've done a couple of surface level dives on double triggers, and thinking about adding it to see how it gets used, but I haven't had time for a deep dive. On my list for next week. It feels a little EDH-centric, which I'm trying to cut down on, but it's definitely a growing area.

000CBomb000 White Weenie, Zoo, and Reanimator should all be hubs already. I have pretty much no experience with 93/94 Old School. How much variation is there between Erhnamgeddon decks, or between Disco Troll decks, or whatever? If an archetype is a consistent tournament winner, that usually suggests it's a tight decklist and doesn't see much variation. I'm trying to cut down on format-specific hubs in general, but if there's enough range, variety, and recognizability, I'll consider it more deeply.