This is a high synergy, low budget cube. The vast majority of creatures in the cube are one or more of the Warrior, Cleric, Rogue, or Wizard types, enabling Party mechanics to function across all colours. About 5% of the cards in the cube are Changelings, which can help fill gaps in party or tribal decks, but watch out for cards like Blow Your House Down that punish an overreliance on Changeling creatures.
Half of the multicolour cards are hybrid, and intended to be flexible in a number of decks (as they're playable in 60% of exact colour pairs). The other half are traditional multicoloured cards and are meant as buildarounds/signposts for specific deck payoffs (playable in 10% of exact colour pairs).
The main supported archetypes for each colour pair in the cube are listed here, but there are other, more narrow payoffs to support several others too.
Azorius: Party
Dimir: Rogues
Rakdos: Sacrifice
Gruul: Treasure Ramp
Selesnya: +1/+1 Counters
Orzhov: Clerics/Lifegain
Izzet: Discard/Draw
Golgari: Graveyard Matters
Boros: Equipment Aggro
Simic: Tokens