Mimicking Scarecrow

You may have Mimicking Scarecrow enter the battlefield as a copy of any tapped creature.
When it becomes untapped, you may have
Mimicking Scarecrow become a copy of another
tapped creature. If you don't, sacrifice Mimicking
Scarecrow.
"Where your eyes don't go a filthy scarecrow waves its broomstick arms and does a parody of each
unconscious thing you do,"
—They Might Be Giants