Slayer activation spell

Although this article is based on canonical information, the actual name of this subject is conjectural.

This powerful spell activated all potential slayers around the world.

Background

In 2003, the First Evil taunted Buffy that despite her efforts, she and her allies would not fare well against the army of Turok-Han vampires. The First also taunted Buffy that she would die alone. Because of this, Buffy came to realize that she could change the rules such that she would no longer hold the power of the slayer line all to herself or share it only with Faith. Buffy then came up with a plan that would involve Willow to tap into the essence of the scythe, thus activating potential slayers worldwide. This spell completely undid the rules previously set by the Shadow Men and effectively change the balance in favor of the side of good.

Procedure

The spell required the scythe as a key material. Willow channeled, and almost exhausted, her energy to the scythe. After a few seconds, the scythe began to glow white. Almost instantaneously, the spell took effect, endowing potential slayers all the powers and abilities of a full-fledged slayer. The spell temporarily turned Willow's hair white, hinting her potential for extremely powerful good magic.

Other

Another effect of the spell was that it allowed Willow to sense the Slayers being activated elsewhere, long after the spell has been completed.