It had taken some doing but she had managed to rework the spell that Willow had told her about. She didn't have the books and it had been sometime since they'd actually spoken about what had gone into it. Not to mention, that Tara didn't believe that she had the raw power Willow had to make it affective. In fact she didn't, period. Especially not in another world where the rules were different. Nevertheless, she had to do this. Not only to give Buffy more of an edge with Glory but to set everyone right. She remembered all to well how it had felt to be lost in that darkness, and no one else was going to have to go through it any longer if she could help it. Tara would be lying, and delusional, if she had said that she wasn't scared. She was terrified. It was people's minds that she was risking taking this chance, and ... she didn't know if she could do it.
She had worked the spell and altered it, rearranging and fixing what worked with what would be safest, as best as she could. Yet even as she arrived at the sight of the battle and the ritual. Tara still hadn't been certain that she would do it. It was only when she looked at those blank faces, and seeing people striking their friends and those who wanted to help them that she knew that she had to do so. Reservation aside.
Goddess, help her. Goddess help them all that this would work and work beneficially.
She had given the spell to the other witches, to Christy and to Paige to give to whoever else wanted to help. Having it effect each person one by one would take too long but she didn't have the exact power to have it alter everyone all at once back to their immediate state. It would work in a wave effect. If it worked at all.
As soon as she got close enough, Tara began saying the spell.