To the last, Bontu wanted only to be first among the God-Pharaoh's subjects.

Bontu's Last Reckoning

Destroy all creatures. Lands you control don't untap during your next untap step.

Amonkhet Remastered

Hour of Devastation Promos

Hour of Devastation

If more than one spell says that lands you control don’t untap during your next untap step, the effects will all wear off during that untap step. You’ll untap lands you control during your untap step after that one.

No lands that you control will untap during your next untap step, even lands that aren’t tapped as this spell resolves. This includes lands that enter the battlefield after this spell resolves.