The Bloody Battlefield was a defensive war that took place in the west of the Wizard World. It would take place every 100 years.
Every 100 years, the magic array set up in the sealed land needed to clean up the accumulated negative energy particles. When it was lifted, the power of the seal would be weakened, and the Wraiths in the sealed land would explode, forming a tide of Wraiths.
If the Wraiths were not stopped from rushing out of the sealed land, they would threaten the entire West Coast.
And because of that, whenever the tide of Wraith erupted, the ruler of the West Coast, the Tower of Order, would summon the Wizards of the West Coast to the Bloody Battlefield to fight against the tide of Wraiths.
The entire period would be from three to five months to several years. During this period, the Wizards needed to block the onslaught of the Wraiths again and again.
Until the magic circle in the sealed land was restored.
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