Shira, Identity Theif

When Shira, Identity Theif enters the battlefield
it becomes a copy of target creature, except
it's still legendary. Target creature loses
all abilities and its power and toughness
become 0/1. When a creature with the
same name on the battlefield dies or is
exiled, choose a new creature on the battlefield to become a copy of, and it losses all abilities and its
power and toughness become 0/1.