Art by Josh HassThis cube is meant to capture, through lore and gameplay, the essence of Ravnica and its ten guilds. Ravnica holds a special place in my heart as one of the first Magic settings I fell in love with when I was first introduced to the game back in 2006. The unique city setting, the "choose your own adventure" feel of the different guilds, and the variety of ways those guilds can become expressions of a player's personality or playstyle have always fascinated me.
The cube is limited to cards that are set on Ravnica, represent native Ravnican characters, or feature characters important to the story of the plane. So something like Izzet Chemister can go in even though it isn't from a Ravnica set. I've tried to avoid populating the cube with minor War of the Spark characters like the various Eternals, but some of it has slipped in due to mechanical necessity of supporting certain archetypes that would otherwise be weak. I've also limited planeswalkers to those like Jace or Liliana, who are central figures to the story of Ravnica or the War of the Spark, with one exception.
The cube's archetypes are as follows:
Azorius 
: Detectives/Clues (Alquist Proft, Master Sleuth | Private Eye | Righteous Authority | Case of the Pilfered Proof | Tangletrove Kelp)
Orzhov 
: Aristocrats (Teysa Karlov | Cartel Aristocrat | Liliana, Dreadhorde General | Ministrant of Obligation | Vindictive Vampire)
Boros 
: Go-Wide Aggro (Firemane Avenger | Sunhome Guildmage | Boros Strike-Captain | Sunhome Stalwart | Legion Loyalist)
Selesnya 
: Tokens/Convoke (Armada Wurm | Wayfaring Temple | March of the Multitudes | Venerated Loxodon | Impervious Greatwurm)
Dimir : Surveil (Mirko, Obsessive Theorist | Disinformation Campaign | Notion Rain | Thoughtbound Phantasm | Doom Whisperer)
Izzet : Combo Control (Thousand-Year Storm | Ral, Storm Conduit | Inescapable Blaze | Enter the Infinite | Jace, Wielder of Mysteries)
Simic : +1/+1 Counters (Roalesk, Apex Hybrid | Plaxcaster Frogling | Fathom Mage | Cloudfin Raptor | Experiment One)
Rakdos : Sacrifice Aggro (Judith, the Scourge Diva | Lyzolda, the Blood Witch | Rakdos, the Muscle | Spawn of Mayhem | Devouring Hellion)
Golgari : Graveyard (Izoni, Thousand-Eyed | Charnel Troll | Drown in Filth | Victimize | Golgari Grave-Troll)
Gruul : Aggro/Stompy (Sunder Shaman | Gruul Spellbreaker | Ravager Wurm | Vinelasher Kudzu | Ilharg, the Raze-Boar)
BROAD ARCHETYPES
Azorius - UWx (4): 8-1 (89%)
4-5 color (11): 17-8 (68%)
Boros - RWx (12): 24-14 (63%)
Rakdos - RBx (6): 12-8 (60%)
Gruul - GRx (7): 11-8 (58%)
Selesnya - GWx (11): 18-14-1 (56%)
Simic - GUx (7): 12-12 (50%)
Dimir - UBx (7): 11-12 (48%)
Orzhov - BWx (11): 13-18 (42%)
Izzet - URx (9): 9-19 (32%)
Golgari - GBx (11): 9-24-1 (28%)
MORE SPECIFIC ARCHETYPES
Bant Tokens/Midrange (3): 7-2
Rakdos Aggro (1): 3-0
Selesnya Tokens (7): 9-9-1
Selesnya Aggro (1): 2-1
Gruul Aggro (3): 8-1
Jund Midrange (1): 2-1
Simic Ramp (1): 2-1
Mardu Aristocrats (1): 2-1
Boros Aggro (12): 24-11
Naya Aggro (3): 2-7
4/5-color Control (8): 14-8
Orzhov Midrange (1): 1-2
Izzet Control (4): 5-7
Dimir Mill (1): 1-2
Golgari Midrange (5): 2-11
Izzet Blitz (1): 0-3
Esper Goodstuff (1): 2-1
Mardu Removal (1): 1-2
Izzet Tempo (1): 0-2
Rakdos Discard (1): 0-3
Dimir control/surveil (2): 3-2
Izzet combo control (3): 4-7
Orzhov aristocrats (5): 5-8
Simic +1/+1 counters/midrange (7): 8-11
Naya/5c ramp (1): 3-0
Dimir saboteurs (2): 3-3
Rakdos Aggro/Discard (1): 2-2
Golgari value/sacrifice/reanimate (1): 1-2-1
Temur midrange (1): 0-2
Golgari dredge/graveyard shenanigans (4): 3-8
Rakdos midrange (1): 2-2
Abzan aristocrats/graveyard/midrange (3): 4-5
Esper saboteurs/ETB/flyers (1): 1-1
Sultai +1/+1 and Graveyard (1): 2-0
Esper control/aristocrats (1): 2-0
Temur +1/+1 (1): 0-2
Azorius control splash G for Hydroid Krasis (1): 3-0
Rakdos sacrifice (3): 5-1
Azorius detectives (1): 2-0
Gruul aggro splash W (1): 1-1
Selesnya tokens splash R (1): 0-2