C300 To Upgrade the Castle Monster to Spy on Him

He glanced over at the castle's warehouse nearby and pulled up a data panel:

Castle Warehouse

Capacity: Expands with castle level upgrades.

Inventory: Over 130,000 units of food, 2.73 million units of wood, 2.8 million units of stone, 1.04 million units of Refined Iron, various Monster Materials, gold coins, gold and silverware, gems, and noble ornaments