Skyscorn, Reality Shifter

{x} must be greater than 2.
Flash, Flying
When Skyscorn, Reality Shifter enters the battlefield, each player who is able exiles a
non-land permanent they control with the
highest converted mana cost under or equal to X.
{w}{u}{g}: Skyscorn, Reality Shifter become a copy
of a permanent exiled by him until end of turn.