YOU SAID:

death shall come if you will it

INTO JAPANESE

あなたがそれをするなら死が来るでしょう

BACK INTO ENGLISH

Death will come if you do it

INTO JAPANESE

やれば死ぬ

BACK INTO ENGLISH

If you do it you will die

INTO JAPANESE

あなたがそれをするならば、あなたは死ぬでしょう

BACK INTO ENGLISH

If you do that, you will die

INTO JAPANESE

そうすれば死ぬ

BACK INTO ENGLISH

Then you will die

INTO JAPANESE

ならば死ぬまでだ

BACK INTO ENGLISH

Then you will die.

INTO JAPANESE

ならば死ぬまでだ

BACK INTO ENGLISH

Then you will die.