This powder is fantastic!
Sell Price to Secret Vendors: 50 Gold
Sell Price at Black Trader: 1K-5K Gold
How to Obtain:
Trade Sleepy Kooii Doll to Noii or Juri for Fantastic Powder (1).
Obtained from opening Ancient Treasure.
Trade with NPC Mystica for Donguri Leaf Hat:
Donguri Leaf (50) + Fantastic Powder (3)