Amulets containing Jedi souls are very powerful talismans indeed, as the trapped souls are continually feeding the amulet (not by their choice!) the energies it needs in order to function effectively and properly. These amulets are not as drained as easily, and some powerful souls are capable of powering an amulet for hundreds of years, depending on the amount of use it receives. Be warned though that amulets containing these powerful souls have been known to take over their user and control his/her actions. Dabbling with these amulets can be very potent but also very dangerous.
Talismans can also be fueled by a handful of Sith Magicians focusing their energies upon the amulet in order to make it more efficient in achieving the desired effect. During these rituals, all involved are channeling their own personal energies into the talisman to make it's powers stronger and more potent. This can be very dangerous though for if the ritual is not performed correctly and too much energy is being channeled into the talisman, the results could be devastating. If too much Dark Side energies are channeled through the amulet at any given time, it could overload and explode with enough force to kill or injure the user, and cause damage to itself or even be destroyed.
Locations of a strong presence of the Dark Side could also serve as effective sources of energy for an amulet during a ritual. it has been recorded through history of Sith Magicians performing rituals in areas of a strong presence of the Dark Side in order to make their magic more powerful, and the same holds true to utilizing an amulet's powers in those same areas. For example, a ritual invloving a Sith talisman would be more effective if performed in the tomb of an ancient Lord of the Sith rather than the streets of a small fishing town on some uncharted planet. The talisman draws upon the almost limitless energies surrounding it to serve as it's source of feul for such operations. Other locations of a strong Dark Side presence could be the sites of massacres or battles where there had once been much death concentrated in a single area, or even any Hallowed ground where a historic event utilizing the Dark Side had once taken place.
