This is a cube based on the multicoloured block Khans of Tarkir. A slower cube with push towards decks with 2-3 colours. My plan was to add in sets as I collected cards personally, with no intention to purchase individual cards just for the sake of the cube. Since its construction, I've added cards from the Battle for Zendikar block and conspiracy, both of which are used to bolster the multicoloured playstyles of the cube.

The themes I am trying to push with each colour combination are:
Abzan - 1/1 creatures and counters, make em wide and tall
Mardu - Puts them on the backfoot, early advantage and stack it in your favor
Jeskai - Non-creature spells matter
Sultai - Uses life, the graveyard, tokens, and exile as resources
Temur - Get big stuff out fast, dragons matter
Azorius - Tempo multipliers
Dimir - Steal, drain, sac
Rakdos - Safe to attack with reward
Gruul - Biggest nastiest creatures
Selesnya - Minor blink and exile
Orzhov - Life drain and tokens
Golgari - Sac-ables and recycle
Simic - Land matters
Boros - Combat tricks
Izzet - Colourless matters

The additional sets add to the power of multicolour decks and even introduce colourless as an additional colour identity for decks. Converge is a very powerful mechanic when you have access to so many colours, delve and reanimator were too conflicting and difficult to support so more grave fuel cards were introduced. Any flavorful cards that achieved something more effectively than an existing card in Khans block are also added.