Elder Scrolls III: Morrowind
Kahn: Soul gems gave me pause for thought as I’m not in the habit of killing beings in order to trap their energy for later enchantments! This is getting into “Sith” territory. The mechanics here are quite involved, but it’s probable that “energy” could be stored in this manner for later use by a skilled practitioner of the magical arts. However, any effect would tend to be more along the “powerful but subtle” variety rather than fireballs erupting from a wand.
GamesRadar rating - 3 out of 5 stars - Bit too flashy