Enchantment
At
the
beginning
of
your
upkeep,
reveal
the
top
card
of
your
library.
If
it's
a
creature
card
that
shares
a
creature
type
with
a
creature
you
control,
you
may
cast
it
without
paying
its
mana
cost.
If
you
don't
cast
it,
put
it
on
the
bottom
of
your
library.
