Dig in the Glade of Trust
Dig in the Sunlit Plateau
Dig in the Forgotten Lands
Dig in the Frosted Heights
Dig in the Vitalys Mines in Sunlit Plateau
Use a shovel to dig random ground spots in these biomes
Complete digging quests and tasks that reward clay
Buy clay from Kristoff’s Stall if it is available
Open some chests or reward bags that may contain clay