Egoist『咲かせや咲かせ』original Movie（劇場中編アニメ－ション『甲鉄城の� Question6

This question test your sense of humour to find the Egoist『咲かせや咲かせ』original Movie（劇場中編アニメ－ション『甲鉄城の� that works best for you. What Do You Think of This Joke?

How do you make holy water? You boil the hell out of it.

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