Spirit Merchant (technically traded). Each of these marks the exact location of an outer biome boss spawn. Each scanner recipe uses a resource unique to the boss's biome. Either found on the ground or as a mob drop. Screenshot by Bonus Action Glow Tulips, and recipes that incorporate them, https://claytonelpuw.wssblogs.com/29893095/core-keeper-gameplay-coisas-para-saber-antes-de-comprar