In the draw you could either get the golden law, or the luck of gilgamesh to get treasures naturally, That way the protagonist, every time he goes to the dungeon, would be lucky enough to always obtain the best drop, items or gems in the best condition from the monsters, as well as find rare materials, You might even find secret areas filled with treasure, or some sort of ancient weapons from past heroes. To be honest, Gilgamesh's ability to obtain treasures naturally helped him a lot in his journey to obtain all the treasures in the world, So having that ability would help the protagonist in many things, How to find excellent quality items in stores at a low cost, hidden or ancient weapons, rare minerals, expensive items, hidden treasures, forgotten weapons, etc.