Niri, Face Stealer

Whenever another creature enters the battlefield
under your control, if another creature shares a
name with it you gain life equal to either
its power or its toughness.
{u}{b}{b}{g}{t}: Destroy target creature if you
control a creature with the same name as it. Niri,
Face Stealer becomes a copy of that card, but it
is still legendary, it’s name is still Niri, Face
Stealer, and it still keeps all of its original abilities.