YOU SAID:
THE VAMPIRE IS WEAK TO THE HOLY POWER OF THE CROSS
INTO JAPANESE
吸血鬼は十字架の聖なる力に弱い
BACK INTO ENGLISH
Vampires are vulnerable to the holy power of the cross
INTO JAPANESE
吸血鬼は十字架の神聖な力に弱い
BACK INTO ENGLISH
Vampires are vulnerable to the holy power of the cross
That didn't even make that much sense in English.