Li, Sleepless Mentor

Li, Sleepless Mentor is all colors.
{1} Tap target creature you control. Surveil 1.
If your devotion to all five colors is at least 2,
sacrifice Li, Sleepless Mentor and return it to
the battlefield transformed.
Li grasped the limits inherent in the Phyrexian
notion of perfection, and so sought language with
which to name them.