Anyanka's origins

1120 years ago, Anya was a human being with some

magical abilities, similar to Willow. When she was

dumped by a man she loved, she performed some

vengeance spells with the aid of the demon

D'Hoffryn. He gave her the amulet that turned her

into a vengeance demon.

Summoning Anyanka: Giles has a large golden goblet

with smoldering ingredients sitting on his desk. He

pulls bits of an herb from a bushel and drops them

into the goblet, saying:

Oh Anyanka,
I beseech thee.
In the name of all women scorned.
Come before me.

The bizarro world
Creation of the bizarro world: Anya takes her

pendant off and puts it around Cordelia's neck.

Cordelia vocally wishes that Buffy Summers had

never come to Sunnydale. Anya turns into Anyanka

and says "Done", and it is.

Altered history: The alternate history was NOT

another "dimension". Cordelia's wish destroyed the

history of our Buffyverse as we know it and created

a new history for the Buffyverse.

------------------------------------------------------------------- 

 Doppelgänger is the German word for a ghostly double of a living person. The word comes from doppel meaning 'double' and gänger translated as 'goer'. The term has, in the vernacular, come to refer to any double of a person, most commonly in reference to a so-called evil twin, or to bilocation. Alternately, the word is used to describe a phenomenon where you catch your own image out of the corner of your eye. In some mythologies, seeing one's own doppelgänger is an omen of death.

The Doppelgängers of folklore cast no shadow and no reflection in a mirror or in water. They are supposed to provide advice to the person they shadow, but this advice could be misleading or malicious. They could also, in rare instances, plant ideas in their victim's mind or appear before friends and relatives, causing confusion.