Glowstone

The Glowstone was a legendary item given to Zero by a farmer during The Voice of Jaarn. It was a family heirloom, but as he did not have any children, and was old, the farmer decided to give it to the men who protecting him and his home.

The Glowstone was an object that would change its appearance to look like the nearest animal within 10 feet. Otherwise it would appear to look like a blue lobster.

When it would change appearances, the Glowstone appeared to become soft, and t could be crushed, destroying it.

However, when the object is crushed, it makes the animal it appeared as completely loyal to the crusher.

Uses
Zero used a Glowstone on a hostile haste wolf, and later renamed him Shadow.