Premier

Premier, meaning "best" or "most important" is an adjective used by Wizards of the Coast and their business partners to denote their top events and products:
*Premier sets the four to six Standard-legal sets that appear each year (expansions and/or core sets), in contrast to supplemental sets.
*Magic Online Premier Play Program the revamped Players Tour system and the Magic Online Championship Series combined into a single program.
*Premier Series a series of tournaments organized by independent tournament organizers that was integrated into the Players Tour 
*Premier Event an event directly organized by WotC, or by their business partners.
*Premier Play the highest levels of Organized Play.