These are crystals that will store a charge from a targeted creature. Double click the crystal and target an undamaged creature. You will have 10 minutes to kill the creature or the soul drain will wear off. Upon death of the creature, the crystal will receive charges based on the creatures fame. Crystal charges can be combined and crystals can be sold with charges on them.
Drag and drop, no edits needed. Standalone system.
It is up to you to determine how players will acquire crystals and how the charges on the crystals will be used.