Witness the Calamity

If your opponent controls a creature with power
4 or greater, scry 1. (Look at the top card of your
library. You may put that card on the bottom of your library.)
Create a 1/1 white Human Cowboy creature
token with vigilance.
"We should, gather the gang. Although, I'm
sure ol 'Horn can see that thing from the sky."
-Sheriff of Westris