Tenrou Jade

The Tenrou Jade (天狼玉, Tenrōgyoku) was an S-Class treasure and Tenrou Island's holy relic. Many years ago, the Tenrou Jade, having absorbed too much evil Magic Power, became impossible to control, and was sealed away. In the year X686, the relic was destroyed after it was hit by Law and subsequently fell from the sky, shattering on impact.

Description
The Tenrou Jade is spherical in shape, with a thick, transparent outer layer. Within this outer layer, lies a dark-colored jewel surrounded by two rings that encircle it without ever actually touching it.

Abilities
Magic Power: The Tenrou Jade is filled with an enormous amount of evil Magic Power, and any human who touches it is brought under the control of that Magic Power. When Yury Dreyar touched it, the jewel completely over took him and caused his spirit to become fused with the bones of a deceased Dragon nearby.