Multiclass is a commander cube focused on building decks around one of 13 creature types representing the 13 dnd classes. all commanders are considered to have partner and the 13 dnd class enchantments are considered valid commanders with partner.

there are 2 dafts; a commander draft and a 99 draft. with the 3 cube being a set of lands and mana rocks that all players can pick from and do not draft.

Some cards when drafted are drafted together. You don't need to use all cards drafted this way in your deck.

These cards are drafted together:
tower worker, power plant worker and mine worker