Anya: For a thousand years I wielded the powers of The Wish. I brought ruin to the heads of unfaithful men. I brought forth destruction and chaos for the pleasure of the lower beings. I was feared and worshipped across the mortal globe. And now I’m stuck at Sunnydale High. Mortal. Child… And I’m flunking math. 

D’Hoffryn: This is no concern of ours. You will live out your mortal life and die. 

Anya: Give me another chance. You can fold the fabric of time. Send me back to that place and I’ll change it. I won’t fail again. 

D’Hoffryn: Your time is passed. 

Anya: Do you have any idea how boring twelfth graders are?

Buffy the Vampire Slayer — Season 3: Episode 16 — “Dopplegangland”