This is The Budget Cube. It can be purchased for less than $90 at the time of the most recent update. Prices routinely creep over time and I routinely revise it.

Important to note: If you draft Squadron Hawk you get a total of 3 copies for deck-building.

I've maintained it for over a decade. It started when I was teaching math in a HS as a way of letting my students play mtg at school for free (for them).

Themes:
UW Artifacts, Control
UB Control, Mill
BR Aggro Goblins, Midrange Goblins
RG Midrange Stompy, Counters
WG Humans, Counters
WB Aristocrats (Sacrificing Creatures for Value/Shenanigans)
UR Counter Burn / Control
BG The Rock
WR Tokens, Equipment
UG Simic Ramp