Twisting Mirror

Whenever a nontoken creature enters the battle-
field under your control, you may pay
{1}{p/u}{p/u}. ({p/u} can be paid with either {u} or 2 life.)
When you do, create a token that's a copy of that
creature, except it's an Illusion in addition to its
other types, its base power and toughness are
switched and it has "When this becomes the
target of a spell or an ability, sacrifice it"
It can't create something from nothing.
That part of you was already there.