Chameleon Collar

{2}: If Chameleon Collar is a creature, it becomes
the color of your choice and gains protection
from the chosen color until end of turn.
Otherwise, equipped creature becomes the color
of your choice and gains protection from the
chosen color until end of turn.
Reconfigure 3 ({3}: Attach to target creature you
control; or unattach from a creature. Reconfigure only
as a sorcery. While attached, this isn't a creature.)