Metashifter

When Metashifter enters the battlefield, choose
a name of a creature card that is currently legal
in the Standard format. Metashifter becomes
a copy of the chosen creature card except it's
still a legendary artifact creature, is a
Shapeshifter in addition to its other types, and
has "Whenever a creature enters the battlefield
with the same name as this creature, exile this
creature."
"A kavu, then a rhino, now a Fblthp."