Source: Introducing the Old School Cube by Craig Wescoe

Important Notes
use the Alpha versions of Orcish Oriflamme and Orcish Artillery since they are each printed as costing 1R instead of 3R and 1RR respectively in Beta onward. These mana costs I think are more appropriate for this cube, giving red a little extra boost.

• Craig Wescoe

Combos
The cube has lots of individual card combos to look out for that can help give your deck a significant boost. These are a few of the noteworthy combos in the cube.

Twiddle + Time Vault = extra turn
Power Artifact + Basalt Monolith = infinite mana
Ball Lightning + Blood Lust + Berserk = 20 damage
Channel + Fireball = dead
Lord of the Pit + Breeding Pit = strategy win and flavor win
Rubinia Soulsinger + Diamond Valley / Ashnod's Altar = kill each turn
Icy Manipulator + Royal Assassin / Tetsuo Umezawa = kill each turn
Chaos Orb + Argivian Archaeologist / Guardian Beast = reusable orb
Winter Orb / Howling Mine + Icy Manipulator / Relic Barrier = one-sided effects
Land Tax + Land's Edge = 6 damage per turn

Archetypes
The best part is that this list of 12 archetypes is by no means exhaustive. For instance, you could draft a heavy artifact deck around Balance, a white-red deck built around Land Tax and Lands Edge, a Eureka deck with Demonic Tutor to find it, and perhaps there is even a way to draft a Stasis deck (with Serra Angel?). I meant it when I said one of my top priorities was to preserve as much space for imagination as possible when drafting this cube. I believe creative exploration was one of Magic's greatest strengths in the beginning, and so I wanted to make sure to capture that as best as possible with this cube. I also wanted it to be fun the twentieth time you draft it and not just the first; novelty of experience is the best way to ensure that happens.
White creatures
White Blue control
Mono Black
Red-Green-x Land Destruction
Grixis Reanimator
Green Ramp
Green-White Erhamgeddon
Jund Land Destruction ft. Nether Void
Blue Red Counter-burn
Blue Back Control
Mono Brown Workshop
Multicolor Midrange Goodstuff