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Sakura Killers (1987)

IMDb: 4.1
1987

Ninjas steal a research tape Colonel chuck connors sends two agents undercover to retrieve it Ninjas are sent to scare them off The two seek help and are trained by a ninja master to become Ninjas themselves

The Devil (1981)

IMDb: 5.4
1981

A hideously ugly witch casts spells on her victims which turns their insides into snakes and worms