Wisps of negative energy wormed into Darkness Eye. Merlin could even sense the "glee" of Darkness Eye in his palm. Before Wizard Leo died, he had told Merlin that Darkness Eye was sentient.
Merlin now felt even more keenly that Darkness Eye was sentient indeed. Darkness Eye only required a continuous supply of negative energy to grow. The master of Darkness Eye would finally be unable to suppress it and suffer from a backlash.
In its lengthy history, most Spell Casters who cultivated Darkness Eye had, in fact, died due to the backlash from Darkness Eye. It was not surprising that Darkness Eye was called a cursed power.
"Want to come out? Without my permission, you have no way of doing so!"
Merlin seemed to be speaking to himself. In his eyes, he glimpsed an enormous ghostly face which snarled as it battered against the unyielding cage. Once it broke through, the ghostly face would surge out and swallow Merlin.