High Priest Orven:
Great! You deserve a reward!
Here's Adventurer's Dye and Adventurer's Dye Powder. The dye itself doesn't grant you Hidden Power, but if you use it to apply a pattern and then upgrade it with Adventurer's Dye Powder, your Hidden Power will reach level 3.
There's a limit on how many times you can upgrade your Hidden Power every day, so keep that in mind.
I hope I was able to help you.