

A cube is usually 360-720 magic the gathering cards that can be used to draft a deck, normally 8 people will form 3x15 card “packs” which they will pass around and take a card.
A cube is often a Singleton format, so every card is different; but there’s a huge amount of ways they can be put together for a unique experience.
You can do anything. I’ve been toying around with making a black and green cube where the players can pick the side of life or death and get a bonus for sticking to one colour for example.
But generally they’re 5 colours. High powered cubes will include a very strong set of lands to help facilitate the draft, such as the 10 alpha duals, the 10 shock lands, 10 triomes and 10 fetchlands. They’re usually picked at a high priority. (The expensive lands will probably be proxies) As with all drafts, basics are added for free after drafting.
You can also build a cube to recreate a draft format, such as Innistraad which to buy a box is very expensive, but 1 of each rare, 2 of each uncommon, and the rest commons can recreate the classic experience.