In role-playing games, a soul gem is an item that can be filled with the soul of a creature. This can be done by killing the creature and capturing its soul in the gem. Soul gems are often used to power magical items or to create powerful spells. Filling soul gems can be a complex and dangerous process, but it can also be very rewarding.
There are many different ways to fill soul gems, but the most common method is to use a soul trap spell. This spell creates a magical trap that captures the soul of a creature when it is killed. Once the soul is trapped, it can be transferred to a soul gem. There are also a number of other ways to fill soul gems, such as using a soul gem extractor or by sacrificing a creature to a daedric prince.