Green Diamond of Invincible power

Information
The Green Diamond of Invincible power, Promsied to give the person finding it the "Invincible power", The power this Diamond gives is unknown, but the Diamond is heavily protected by evil spirits in the Stronghold, the Stronghold is in the Plains and requires 5 people to open the gate by putting their hands in the holes meant for arms, each person needs to have a different personality in order to make the gate accept them.

Green Diamond of Invincible power can resurrect people who died while being in anger, and turn them into the spirits that cannot feel pain, making them hard to get rid of, those kinds of spirits are protecting the Diamond in the Stronghold.