2056ab3d_Guide___Kings_and_Legends_Wiki__Description
[Upgrade to] Level 15 [Unlocks] Shimmering Cave (N) [Rewards] 1000 3 [Description] 
Boss Fights can yield equipment, Epic cards, Gold, Silver and more! A Standard Race pack has 6 random cards from a certain race. May contain Epic cards.
Game Guide - Kings and Legends Wiki
Description