Cleopatra

Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)
When Cleopatra enters the battlefield, you become the monarch. At the beginning of your upkeep, if you are the monarch, proliferate.
"In my kingdom, I am the absolute law. I don't discriminate between statuses. Hmph! Now, relax
and enjoy your stay here!"