The Stockwood Scrolls
The Spellplague was a disaster that struck on 29th Tarsakh, the Year of Blue Fire, 1385 DR, and was caused by Midnight’s assassination at the hands of Cyric and Shar. With the goddess’s death, the Weave, the universal structure of arcane forces, convulsed. It continued for a decade, leading to the Wailing Years, during which arcane magic ceased to function and the planet of Toril was transformed.
The breakdown of the Weave could be felt by all wizards across Faerûn.