Soul

Souls were the supernatural essence of a living or sentient being, although the specific rules that governed them varied from one universe to another.

Some Demons were interested in purchasing souls. Jenny Everywhere's boyfriend David once sold his soul to a Hellhound, (COMIC: My Bloody Valentine) but earned it back after performing a valorous deed. (COMIC: Soulless Mate)

One of Alistair Neezley's tall tales, which he repeated almost every year around the Christmas period, involved him claiming that he had substituted himself to the Ghost of Christmas Past as part of an adventure which saw him save the immortal soul of a sentient polar bear. (PROSE: The Winter Quests)