apr 30, 1385 - Spellplague / Storm of Blue Fire (Theory)
Description:
Mystra's death by the hands of Cyric and Shar, caused the Weave to collapse and, without the Weave, the Shadow Weave was unable to be maintained and collapsed as well. The breakdown of the Weave was felt by all wizards across Faerûn. The corrupted madness of Cyric defiled what arcane forces remained from the dissolution of the Weave, resulting in a new magical source of defiling arcane energy in the form of blue flames that destroyed Dweomerheart and continued to spread across the multiverse.
The Spellplague affected the landscape, making the ground rumble and heave up and down like the surface of the sea. Curtains of blue flame swept the landscape, reshaping the land by cutting crevasses or lifting and sculpting the plain into hills and ridges. Shards of earth wrenched themselves free and became earthmotes.
The Spellplague manifested in Toril as a storm of blue flames in the Mhair Jungles, west of Halruaa, and quickly grew to a massive size. Halruaan wizards, having divined the death of Mystra and the destruction of the Weave, were able to use the energy of the blue fire to save most of their kingdom by shifting it into another world, Abeir.
It was through the planar gates that the Spellplague traveled across time and space, and reached the world of Abeir. In that world, the Spellplague first appeared in Gontal, the southwestern region of the continent of Laerakond, where it made contact with ancient Glaur, the fortress of the Primordial Nehushta. The fortress detonated when the "Blue Breath of Change" ran through it, in an explosion as potent as the Tearfall, rocking the entire planet of Abeir and creating the Glaur Barrens where the old fortress once stood.
However, the remaining Halruaan lands in Toril were laid to waste due to the heavy wild magic activity in the area, in such a catastrophic way that the explosion was felt as far as Waterdeep. Sespech, the Golden Plains, and the Nagalands were also affected, and those lands were transformed into an unpredictable and surreal place, dubbed the Plaguewrought Lands.
That region, where the city-citadel of Djerad Thymar was located, crashed on Unther, still enveloped in the blue flames. Many believed the Untherites and the Mulhorandi occupation forces were obliterated in the explosion that leveled and reshaped the whole region except for the Black Ash Plain, but actually Unther was instead transported to the world of Abeir. However, it was transported to the lands of Shyr, the equivalent continent to Faerûn in Abeir.
The blue flames also infected portals and planar gates, spreading even further across Toril. Almost every part of Faerûn was affected by the Spellplague and certain areas were eliminated entirely, while others were created anew. Thousands of spellcasters were either destroyed or went insane due to the collapse of the Weave after Mystra's death. In Cormyr, a third of the War Wizards were either killed or driven mad. Those who survived lost their ability to use arcane magic. Other continents, such as Kara-Tur and Osse, were affected by the Spellplague as well.
The rest of Laerakond was sent to the Trackless Sea, where it subsumed the lands of Maztica. Maztica was transported to Abeir, and Laerakond, which became known as 'Returned Abeir', remained on Toril.
The sudden shifting of continental bodies sent tsunamis all along the island and coastal regions of Faerûn, devastating them all. Lantan was hit harder than most. Before the waves reached the island, all the smokepowder and magical reagents exploded at the same time, causing great chaos. And as the waves reached the coastline, most of Lantan was engulfed by the blue fire and send to Abeir. What remained of Lantan on Toril was entirely flooded, killing the remaining Lantanese and cleaning away their advanced technology.
the worlds of Toril and Abeir were undergoing their periodic planar conjunction. This proved to be apocalyptic, because it allowed the Spellplague to unravel both worlds.
The Spellplague infected portals and planar magic, shaking the planes and spreading to the world of Abeir.
(Mystra's death warks the start of the spellplague)
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