New Format in MTG: What is Pioneer?
Pioneer—a new nonrotating format featuring cards from Return to Ravnica and forward.
Pioneer is a constructed format and therefore adheres to the following constructed rules:
- Minimum of sixty cards
- No maximum deck size, as long as you can shuffle your deck unassisted
- Up to fifteen cards in your sideboard, if used
*With the exception of basic lands, your combined deck and sideboard may not contain more than four of any individual card, counted by its English card title equivalent.