Pretty interesting Top 8 here
We didn't want to use an X in an activation cost because we were worried it would cause confusion (yes, as long as X is the same variable the rules can handle it, but experience has shown us time and again that variables are one of the most confusing things in the game for a lot of players), so we tried having the effect limited by the size of the X variable
We wanted to ensure we captured the classic pose of him raising the sword before his face as a nod to the box art, but we had to update the pose slightly so players could see his full face in the art we made of him in-world
Id recommend adding a Thassas Oracle or Jace, Wielder of Mysteries to make sure you dont draw yourself into a corner
Stomper has had some good times, most recently as part of assorted Domain strategies
If this spell was bargained, that creature also gains flying and lifelink until end of turn