Cube designed around Three Colour Archetypes, in a similar fashion to Core Set 2020.
The Archtype Descriptions are as follows:
Bant Enchantress
Esper Spirits
Grixis Creature Recursion
Jund Sacrifice
Naya Heroic
Abzan Counters
Jeskai Flashback
Sultai Delerium
Mardu Warriors
Temur Cascade

450 card structure:Spells:
10x Tricolour (Where they exist, these are signposts for archetypes)

70x (10x7) Dual-colour (Tradditional Gold cards. Each archetype gets two in each of it's three pairs. There is also one generic card in each colour pair)

30x (10x3) Soft multicolour cards. (Typically Hybrid, or with off colour activated costs. Playable in any colour, but often benefit from being in both of their colours)

270x (5x54) Monocolour

10x Colourless

60 Lands:
10x Pathways
10x Slowlands (Innistrad3)
10x Shocklands
10x Checklands
5x Temples (Enemy) // 5x Cycling Duals (Ally)
10x Triome