Gale-Twin, the Face Stealer

Whenever a creature you control becomes a copy
of another creature or a token enters the
battlefield under your control as a copy of
another creature, you may choose another
creature. The copy gains all abilities of the
chosen creature.
{2}{g}{u}{r}: Gale-Twin, the Face Stealer becomes
a copy of target creature, except it has all other
abilities, its name is Gale-Twin, the Face
Stealer, and it is legendary.