2056ab3d_Guide___Kings_and_Legends_Wiki__Description
[Upgrade to] Level 12 [Unlocks] Alchemy Lab [Rewards] 1000 [Description] 
Get experience from Map Regions, Boss Fights and the Arena. The Alchemy Lab can Combine, Extract and Fuse cards. Build / Upgrade the Alchemy Lab in the City Hall.
Game Guide - Kings and Legends Wiki
Description