Hello, I'm a specialist in the lore of various fantasy and gaming universes. When it comes to the concept of a "soul gem," it's often a fictional element used in different contexts. However, one of the most well-known uses of soul gems comes from the Elder Scrolls series, particularly in games like Skyrim.

In the Elder Scrolls universe, a Soul Gem is used to trap the souls of creatures. The capacity of the gem to hold a soul is determined by its size. There are different grades of soul gems, ranging from Small, which can hold a Low-Will soul, to Grand, which can hold a Grand-Will soul. The larger the gem, the more powerful the soul it can contain.

To fill a soul gem, a character typically needs to use a device called a Soul Trap, which can be an enchanted item or a spell. When a creature is killed while a soul gem is in the character's possession, the gem will absorb the creature's soul, provided it is of a compatible size.

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Soul size is determined by enemy type. Generally, smaller or lower-leveled creatures possess lesser, petty, or common souls, such as foxes, Falmer or Chaurus. Larger or higher-leveled creatures possess greater or grand souls, such as mammoths (grand) or giants (greater).read more >>