Cull of The Ancient Peaks

Create Nktah, The Resounding, a legendary
7/7 Dinosaur creature token with Flying and haste that's white, blue, and red. It has
"When Nktah, The Resounding enters the battlefield, destroy another target permanent. Its controller creates a 4/4 red Dragon artifact creature token with flying and haste".
It would be better if the sky were falling.