Zanafor's Discovery is the Wave 4 Expansion Set in the HeroScape series.There are 4 boosters: Greeks & Vipers Soulborgs & Elves Lawmen & Samurai Heroes of Trollsford Detailed list of figuresThis expansion introduces an undead unit to the game as well as beefing up the Soulborg, Elven and Samurai armies. More lawmen are also added to the mix along with a smattering of other assorted heroes.Expands: Heroscape Master Set: Rise of the Valkyrie HeroScape Master Set: Swarm of the Marro - BoardGameGeek