This is my Jumpstart-inspired Cube.
For those unfamiliar with Jumpstart, it's a Magic product with packs containing a random, fixed 20-card deck. To play Jumpstart, each player takes 2 Jumpstart packs, opens them, and shuffles them together to create a deck.In that vein, this is my attempt to create an alternate, slightly higher-powered version of Jumpstart.

Draft/Deckbuilding Formats

• The Casual method - Randomly draw 2 packs for your deck.
• The Official(?) Paper method - Randomly draw 4 packs, pick 2 to be your deck for the game/match/session.
• The Arena method - Randomly draw 3 packs, pick 1. Randomly draw 3 more packs, pick 1. These 2 packs become your deck for the match/session.

Design Points

• 1 Mythic Rare per pack for most packs. A mythic rare should be emblematic of the deck's theme.
• A large portion of packs should be monocolor.
• 2-color packs are a monocolor pack splashing a 2nd for the only available signposts. Dual lands are the common MH2 Artifact and KHM Snow duals.
• Color balance in themes is less important than a breadth of themes.
• A single pack shouldn't be able to do everything. There shouldn't be all of enablers, payoffs, card advantage, removal, and ramp in a single pack.
• This cube will in no way interact with the retail JumpStart set.
• Every card within a pack should be 100% usable without using a "choose a color" or "any color" source. A green pack may use G/B dual lands for access to an activated ability (Thelon) or alternate cost (Spider Spawning).

Update Note 2/17/22
Any tag prefixed with a (D) is considered deprecated. Rather than delete anything from here on, I'd like to just mark things as abandoned.