It makes no sense that Both HP and MP potion have pity piece system but only HP has the smaller version.
If you can't make it possible with Infinite MP potion, just allow us to exchange pity piece for another pity piece (Example: Blood Wolf's Oath to Tranquil Tinniolum or maybe Dragon's Fang into Katzvariak's Venom and etc.)
We worked hard on getting those pity pieces and we just want to make the most out of the extra pieces we have. Please consider.