Dark Double

You may have Dark Double enter the battlefield
as a copy of a creature or planeswalker you
control, except it enters with an additional +1/+1
counter on it if it's a creature, it enters with an
additional loyalty counter on it if it's a
planeswalker, and it isn't legendary if that
permanent is legendary.
Your form is feeble, yet delicious to assume.
Your family will scream when they are all
that I consume.