Pioneer

Wizards doc
 
This nonrotating format features sets from Return to Ravnica, forward. It aims to be more powerful than Standard but less powerful than Modern or Legacy. Constructed decks can have up to four of any card in their combined deck and sideboard. Basic lands are not included in this restriction.
  • Minimum deck size of 60 cards - Up to 15 cards in your sideboard (if used)
 

Decks