Sans AU’s react to ??? (check the description) / Реакция АВ! Сансов на ??? (проверьте описание)

Used background music: Occisor (UnderVerse Killer Sans theme)

Used material in video:
Sudden Changes Sans battle—https://youtu.be/1Nf9SqLxnB4

Error404 Sans battle—https://youtu.be/DNlnvpDmdX4

Green Sans: Phase 4 battle—https://youtu.be/nhJsLbUqOGI