Pan Guardian

When damage would be dealt to Pan Guardian,
you may pay {2}. If you do, prevent that damage
and put a -1/-1 counter on Pan Guardian. Create
a 1/1 artifact creature token with "{2}, {t},
Sacrifice this token: remove a -1/-1 counter from target creature."
It is said that the One of Many watches
all things at all times, so it cannot be taken by
surprise.