Season 6 - Tara draws Willow's power just before the Ressurrection

I remember this story but I can't think of the name. Tara uses a crystal to draw off some of Willow's power. She gives it to Spike and at the cemetery Spike shows up during the spell. He smashes the crystal. Buffy still comes back but Willow doesn't have any magic anymore.

I think you are looking for "Learning to Fly" by Spike_spetslayer at bloodshedverse

Thanks! I can never remember the name of that story!

No problem!