Mirror Maze

When Mirror Maze enter the battlefield, Exile
target creature. When Mirror Maze leaves the
battlefield, return the exiled card to the
battlefield under it owner's control.
At the beginning any upkeep, you may create a
token copy of the exiled creature; except it is
Blue, gains the Illusion type,and gains Haste.
At the end of the turn, sacrifice it and put a
shatter token on Mirror Maze, if there are
7 such counters on it destroy Mirror Maze.