We need the ability to exchange energy for crit buff, so we don't have to constantly go back to Heidel for Carolin's crit buff.

Also, we should be able to exchange excessive energy directly with the black spirit, instead of going to Velia for energy bottling. This will help a lot with boss alts that we don't have them moved, but have energies we can't use for anything else.

Be nice to get some life buffs from them too