Tree of Savior Forum

Item appearance - Help

I’m currently running wastrel dungeon so I can drop wastrel recipe and craft wastrel one handed mace to put its appearance on my varna mace.
I know I have to own 3 wastrel weapons of the same kind to extract the appearance.
When I go to the blacksmith there are two options: keep potential and drop potential. One costs 32kks and the other seems free.
Is this free option good? How many potential do I lose? If it’s just one, that’s ok for me.
I tryed with just one weapon on my inventory so I don’t know if it’ll keep like this with all 3 same weapons.

iirc only 1 potential lost.