Serasia Black x Sirius Black, cousins from the Black family, one year apart in age, so don't let them in if you don't like them.
Trace elements of the Lord of the Rings, with guest appearances by Sedie and Ye Zi (probably?
The heroine has traveled through time, is a trace of Golden Finger, and is Narcissa's biological sister.
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The forbidden spell tears apart time and space, the elf arrows pierce the snow curtain, and betrayal and love conspire in the blizzard. They use taboo spells to sneak into their destiny, but they don't know that their destiny has long been frozen into a monument - some encounters are destined to be annihilated in the avalanche of the twin world.
Intention:\\