The bulk cube was originally made from the bulk that I've obtained over the last 10 ish years of playing magic and I've been steadily upgrading it with pet cards printed over that period. The cube is focussed on playing fair magic at a standard or penny dreadful -ish power level. To achieve this the cube incentivises board pressence and creature based combat, and intentionally avoids game warping cards or archetypes (i.e. planeswalkers, value engines, fast reanimator).
Below are some examples of the more specific archetypes that are supported/intended. Disclaimer: I'm impatient and update the list often but not this overview, so the cards shown may be out of date.
Archetypes:
Tempo spellslinger
Control spellslinger /
Creatures in graveyard
Big monsters WIP
Aristocrats
Blink
ETBS WIP
+1/+1 counters
Tokens /
Discard
Artifacts