"Will" vs "Would" in the sentence [closed]

On the Day of Judgement when nothing but God's justice WILL reign supreme.

or

On the Day of Judgement when nothing but God's justice WOULD reign supreme.

Which of the two is correct? Also feel free to point out any other possible mistakes in the sentence.


Solution 1:

Both are grammatical, with slightly different meanings: will is making a prediction: this is what will happen when the day comes. Would is contingent: this is what would happen if the day came.

(I presume the change from God to Allah was not what you were talking about).