This is an unpowered cube designed around companions/the companion mechanic. While it is possible to draft and play a successful deck without using a companion, drafters should feel encouraged to draft a companion and build around it by the nature of the environment.
Packs do not necessarily need to be seeded, however having all 10 companions featured within the first packs passed around the table will make drafting much easier for your drafters to plan the rest of their draft and find their lane.