An elf bar is made of 20 puffs of magic dust, which is a potent and concentrated form of magic. These puffs can be used to power various enchantments and spells, as well as to create delicious treats. However, elf bars are extremely potent, so one bar is usually enough to provide a full day's worth of magic. Elf bars are an important part of an elf's diet, providing them with the energy and strength they need to perform their tasks.