Soul Orb
At first glance, looks like an ordinary glass bead. However, if you take a closer look, you will see a soul trapped inside. Listen closely, and you will hear its whisper: 'Here, in the depths of darkness filled with horror and despair, one may acquire special powers, and that will let them rule the world.' It's time to go to the Conquest world.
Not dropped by monsters.
Cannot be spoiled.
The chances are official (x1). On servers with x10, x100 and higher rates, drop and spoil come more often.