"[Type]cycling [cost]" means "[Cost], Discard this card: Search your library for a [type] card, reveal it, put it into your hand, then shuffle." This type is usually a subtype (as in "Mountaincycling") but can be any card type, subtype, supertype, or combination thereof (as in "basic landcycling")
You get 24 total packs in a box, but no guarantee of Flopsie
Update : Wizards has also revealed the A Box of Rocks drop as well as the Party Hard, Shred Harder drop and We Hope You Like Squirrels drop
Players wanting to play the deck in Commander should swap out the extra copy of Mossfire Valley for a basic land or the land of their choice.).
But in fact, he succumbed to the persuasion of a priest of Myrkul (a god of death) with ties to the Cult of the Dragon, who convinced Ebondeath to become a dracolicha fearsome undead dragon