- "My former master, Tcha Khan, may not have had as many men doing his bidding as Distreyd himself but he was a man of a highly intelligent mind. He would not give a shard of Krystallopyr away without making sure that it was not used against him. This is a scroll from the libraries of the clerics of Nergal. You will not find every stretch of information in the books held in Magestar or Myridia, and this is one such source of information. For there are some places in this world that, when you bring the right person, are not as they seem. My friend, here, Rastus, has access to one such place, for reasons unknown to him or I, but he can move into them. It lies in a cave in The Roost. In this cave, Rastus found this scroll and a perfectly spherical stone roughly the size of a cricket ball. The scroll details that the stone, when used by a Lefein, will counter Krystallopyr--maybe even render Krystallopyr powerless. Nightmares will trouble us no more."
- —Hamish Hawkswing to the Fellowship of Magestar
The Cricket Ball of Magic, also known as Deus Ex Cricket Ball, was an informal name given to a magic stone the size of a cricket ball which played a major role in the Great War. The stone was an ancient Lefein artifact which held the power to nullify the power of magical items such as the shards of Krystallopyr. High Cleric Distreyd Thanadar XII was using the shards to project nightmares all around the world, which helped the armies of Yamato conquer the neighbouring kingdoms, and thus it was important for the Grand Alliance to find a way to put an end to the plague of nightmares by using the stone and stand a chance against Distreyd's forces.
Hamish Hawkswing and Rastus Derelict, clerics of Nergal, approached Josiah Amdusias who had gathered the Fellowship of Magestar to protect Aison from Distreyd's forces. The clerics revealed what they knew about the Cricket Ball and how it could be used to nullify Krystallopyr's power. Although many members in the party were distrustful of the clerics who had once been their enemies, they realized this might be their only viable option to combat Distrey'd magic, so they let the clerics join them while Josiah sent all of them on their way to retrieve the stone from a cave hidden somewhere in the Roost.
After an adventure which included a surreal confrontation with a deranged would-be dragonslayer, and fighting against a horde of evil, fluffy bunnies, the party did discover the stone thanks to help from Rastus and Abel Highwind after receiving words of advice from dragons.
The party eventually figured out that to activate the Lefein artifact's hidden powers they'd need a pureblood Lefein, and Abel happened to know the last surviving Lefein in the world: Daventhalas de Mont Hault, who had last been seen in Remon. They travelled to Remon, and eventually located Daven who began studying the artifact while the party joined the Alliance in the fight against the Yamatians.
Eventually Daven and the rest of the Alliance figured out, thanks to advice from Rune, that there was an ancient Alentian reactor underneath Libaterra which could potentially charge up the stone since the stone and the reactor were relics from the same bygone age.
The party took the stone to the underground reactor core and charged it there as Rune had instructed. It worked as intended at first, the recharging stone destroying many shards of Krystallopyr with immense magical energy, but there was also an unintended side effect as the unleashed energy ended up destroying the Libaterran capital Lutherin in a flash of light while the heroes of the Alliance barely escaped from the city alive. The Cricket Ball was not seen again after the incident in Libaterra so it was presumably destroyed in the explosion.