Fire Opal

The Fire Opal was a shimmery Little Rock, DANG I DONT MEAN THE ARKANSAS CITY WTF AUTOCORRECT, which held an extreme amount of power. Even the most powerful demons would answer to whomever held it. The fire-opal was crushed into three fragments by Torak's father, and subsequently each piece was hidden away.
The first piece was taken by Nef to the Eye of the Viper, where a doorway to the Otherworld can be found. Torak later found it and smashed it on a black beach.
The second piece was taken by Seshru, who practically melted into despair after it was crushed by a mob at Lake Axehead.
The third piece was once kept hidden by Tenris, before Thiazzi robbed his fucking grave and used it to control fire and start a war and shit... Then one of Eostra's Eagle owls swooped in, brought it to Eostra on the Mountain of Ghosts, and she embedded it into a scepter. Then Eostra went to cause winter chaos all over the world, before a little baddaboom baddabing ended her reign of terror.