Welcome to the Synergy Commander Cube! The cube works well using the MtG Commander Draft rules: https://magic.wizards.com/en/formats/commander-draft. 3 packs of 20 cards, drafting two cards at a time, building a deck of at least 60 cards (including commander(s)).

The cube is casual, while still allowing for some powerful decks to be created. When designing the cube, I followed these rules:

1. Do not include any cards which create two mana on turn one (ex. Sol Ring, Mana Crypt, Ancient Tomb), as these too easily allow one player to jump out way ahead of the others

2. No two-card infinite insta-kill combos (3 or more is fine as long as they aren’t too easy to pull off. 2 card infinite mana combos are fine, but will be monitored in case they end up being too powerful)

3. Prioritize synergy over "good stuff" cards

4. Limit tutors (ex. Demonic Tutor, Enlightened Tutor), as these reduce variance (something I find fun in singleton formats). Also, they take spots from more interesting cards

In addition, I keep overall power-level of cards in mind when considering them for the cube, eliminating single cards which either end the game on the spot (Craterhoof Behemoth) or too easily allow a player to gain an insurmountable advantage (Gaea's Cradle). I'm always happy to chat about why specific cards are in/out, and welcome constructed criticism.

The following house rules are used:

1. The nephilim (Ink-Treader Nephilim and friends) are legal commanders.

2. "Partner", "Partner with", "Choose a Background", and "Friends Forever" are all equivalent to "Partner". This gives more drafting options when finding commander(s) that match the colors you're looking for, and provides interesting new commander pairs. Build a +1/+1 counters deck with Pir, Imaginative Rascal + Reyhan, Last of the Abzan, or maybe some 5-color good-stuff deck with Cecily, Haunted Mage + Yannik, Scavenging Sentinel. Go wild!

With these house rules, I've found that no pack seeding or separate commander draft is necessary for successful drafts. The cube can be fully shuffled with random packs giving plenty of opportunities for all players to get commanders for their decks.

In general, I wanted to design a cube that both relatively new players and seasoned players could draft and have fun with! Take a look at some of the strategies below to get a sense of what’s supported in the cube:

GENERAL STRATEGIES
TOKEN SWARM/”ARISTOCRATS”
Primary colors: Red

Secondary colors: Black, white, green

This strategy is all about generating a lot of little tokens which often get sacrificed for value. Be on the look-out for token producers like Siege-Gang Commander, sacrifice outlets like Ashnod's Altar and Goblin Bombardment, and aggressive cards to take advantage of all the tokens like Purphoros, God of the Forge.

Good commanders: Judith, the Scourge Diva; Korvold, Fae-Cursed King; Dune-Brood Nephilim

“BIG” TOKENS
Primary colors: Green, blue, white

Secondary colors: red

This differs from the previous strategy in that you care more about the size or quality of your tokens. Some of the best tokens to populate are ones that are copies of real creatures, like from Mimic Vat or Stolen Identity. Prioritize token doublers like Parallel Lives.

Good commanders: Trostani, Selesnya's Voice; Riku of Two Reflections

INSTANTS AND SORCERIES
Primary colors: Blue, red

Secondary colors: Green, black

Ramp up your mana and have big turns copying your instants and sorceries to draw a bunch of cards and finish with a large Comet Storm. Prioritize mana artifacts like Coalition Relic or other ramp cards. Keep in mind that there are several spells which untap lands like Turnabout or Frantic Search, so one way to have a really big turn is to take advantage of Lotus Vale and/or a flipped Primal Amulet to make a bunch of mana or make multiple spell copies in a single turn.

Good commanders: Alania, Divergent Storm; Riku of Two Reflections; Yidris, Maelstrom Wielder

ARTIFACTS
Primary colors: Blue

Secondary colors: black, white, red

Take artifacts, make artifacts, profit! Gather some high-synergy artifacts with the potential to go infinite. Live the dream of assembling Blasting Station + Grinding Station + Salvaging Station + Summoning Station + any one mana artifact like Manifold Key!
Even if you don't get all of the pieces, you can often still do some powerful things.

Good commanders: Sharuum the Hegemon; Hargilde, Kindly Runechanter + Silas Renn, Seeker Adept

+1/+1 COUNTERS
Primary colors: Green, black

Secondary colors: white

Prioritize taking cards which add or double counters like Corpsejack Menace and Hardened Scales. Take cards which like +1/+1 counters like Threefold Thunderhulk and Crystalline Crawler. Keep an eye out for One with the Kami and its interaction with cards like Bloodspore Thrinax + a sacrifice outlet.

Good commanders: Ghave, Guru of Spores; Pir, Imaginative Rascal/Reyhan, Last of the Abzan; Witch-Maw Nephilim

LIFEGAIN/ANGELS
Primary colors: White, green, black

Secondary colors: Blue, red

There's no Exquisite Blood in the cube to avoid the two-card kill combo with Vito, Thorn of the Dusk Rose, but that and Vizkopa Guildmage enjoy hanging out with Lyra Dawnbringer and her angel friends. Lifelinking creatures also pair nicely with Angelic Accord. Soul Warden and Blood Artist are great pickups alongside Regna, the Redeemer and Crested Sunmare.

Good commanders: Bilbo, Birthday Celebrant; Regna, the Redeemer/Krav, the Unredeemed;

DRAGONS
Primary colors: Red, black, green

Secondary colors: White, blue

Take creatures with the Dragon type, pair them with cards that work well with other Dragons (Utvara Hellkite, Atarka, World Render]). Maybe double up your Dragons with Miirym, Sentinel Wyrm.

Good commanders: Niv-Mizzet Reborn, Prossh, Skyraider of Kher

NOTABLE INFINITE COMBOS

Myr Turbine + Anointed Procession/Parallel Lives/Doubling Season + Clock of Omens

= infinite myr

Pentavus + Blade of the Bloodchief + Ashnod's Altar/Krark-Clan Ironworks

= infinite colorless mana

-> Add Doubling Season for infinite Pentavites and an infinitely large Pentavus!

Blasting Station + Grinding Station + Salvaging Station + Summoning Station + any 1 cmc artifact

= infinite winning in basically any way you want

Kenrith, the Returned King + Crystalline Crawler + any two of (Hardened Scales/Winding Constrictor/Pir, Imaginative Rascal/Corpsejack Menace/Doubling Season)

= infinite mana of any combination of colors, then infinite life, reanimating any number of creatures, drawing any number of
cards, then giving all your creatures haste all with Kenrith

Reassembling Skeleton + Phyrexian Altar + Requiem Angel/Ogre Slumlord + Anointed Procession/Parallel Lives/Doubling Season

= infinite spirits and infinite mana of any combination of colors