Prime Champion of Tariel

Double Strike, Vigilance
Prime Champion of Tariel has Hexproof as long
as it's untapped, has Lifelink as long as you have
10 life or less, can block any number of creatures
as long as it's the only creature you control and
get +1/+1 for each creature you control sharing
at least 2 colors with it.
{t}: Prime Champion of Tariel deals damage equal
to it's power to target tapped creature