Zyfron, Molten Castlekeep

Dethrone (Whenever this creature attacks the
player with the most life or tied for most life, put
a +1/+1 counter on it.)
Protection from Dragons (This can't be
blocked,targeted, dealt damage, or enchanted
by any Dragon.)
It's a knights' duty to serve their king, but in times
of war, a real leader must take charge.