There’s an official Wizards of the Coast article detailing different ways to play with Jumpstart packs. This cube will prefer the format offered on Magic Arena.

Steps:

1. See 3 random packs, then select 1.
2. See 3 new random packs, then select 1.
3. Combine the 2 selected packs.
4. Play!

The general “formula” for a Jumpstart pack is a MONOCOLORED pile of 20 cards that can operate on its own consisting of the following:

• 8x Creatures
• 2x Removal spells
• 2x “Flex” slots
• 7x Basic lands
• 1x Dual land (Thriving)

White	Blue	Black	Red	Green	Other
Angels	Bounce (todo)	Discard	Chandra Burn	Elves	Modular
Basri	Faeries	Liliana Graveyard	Dragons	Garruk	Myr
Feathered Friends	Flyers	Phyrexian	Dwarves	Plus One	Animated Lands
Kithkin	Merfolks	Rogues	Elementals	Snakes
Lifelink	Spells	Vampires	Goblins	Squirrels
Blink	Shapeshifters	Demons	Landfall	Land Count
Unicorns	Cards in Hand	Deathtouch	Equipment	Dinosaurs