Crenshinibon
Crenshinibon, also known as the Crystal Shard, is one of the most powerful items in existence on the Material Plane. Created long ago by a group of wizards, it is sought after by both man and demon.
Creation
The Crystal Shard had been created by seven undead wizards, who were being watched by Ertuu. The seven poured out all their evil into the artifact and made its energy source the light of the Sun, however they ended up placing more power into the artifact than they possessed and it consumed them. The aftershock of this explosion caused Ertuu to once again be banished to the abyss, leaving him to seek out the Shard. However, on the surface world, the Crystal Shard rested in the North Mountains. In the snows it waited, as millenia passed until one day, a power-hungry man should find it...
The Crystal Shard
After Akar Kessell, the young mage, is fooled into murdering his master he finds himself alone and yearning for power. And so, as he walks through the deep snows of the North Mountains, the Crystal Shard reveals itself to the man feeling his weakness. Akar realizes instantly that Crenshinibon can grant him his greatest desire, to be respected.
So, Akar submitted to the Crystal Shard and from it came untold power, with three magical words, Ibssum Del Abdur, a giant fortress resembling the crystal emerges from the snows. Akar had finally found his home and the Shard had chosen its servant.
Akar remained in the Crystal-Tirith for many years, learning the limits and learning to control the power of Creshinibon. Akar was then content, but the Shard demanded more, it demanded conquest and for that to be accomplished it demanded Akar amass an army.
Akar did so, and he too reaped rewards from this, as he gained loads of treasure as well as a harem of women, all too willing to fulfill his desires thanks to the mesmerizing powers of the shard.
Ertuu, the demon who wishes to possess the crystal storms into the Crystal-Tower but he soon realizes that it will not be possible for him to steal Crenshinibon with sheer force and so instead he becomes an ally of Akar, both of them willing to conquer the world for the Crystal.
For some time, the shard begins to yearn for war and conquest, convincing Akar to gather an army with Ertuu at his back. The two fight over Akar's capabilities in using the Crystal when both know it has told him other individuals better suited to be generals in his army rather than the one he chose.
But Akar shouts at Ertuu, "Crenshinibon advises, but I decide!" proving that Crenshinibon is not in complete control of his stubborn host.
Yet after suffering some losses, Akar heeds the Shard and Ertuu's advice and so decides that he and his forces must strike immediately.