A creature that can only survive by adding mana regardless of race, most of the time it degenerates into a lesser creature.
Demons might have traditions centered around chaos, destruction, and the pursuit of power. Their customs could include rituals of dark magic, sacrifices to demonic entities, and ceremonies to invoke infernal blessings or curses.
Demons might speak a language filled with guttural sounds, hissing whispers, and infernal incantations. They might also communicate through telepathy or possess the ability to understand and manipulate the minds of mortals.
Demons might delight in spreading chaos and discord through acts of violence, terror, and manipulation. They might create art that reflects their twisted and malevolent nature, such as grotesque sculptures, nightmarish paintings, or cursed artifacts designed to corrupt and ensnare unsuspecting victims.