Ana, Golgari Usurper

{2}{g}{b}: Monstrosity 4. (If this creature isn't monstrous, put a +1/+1 counter on it and it becomes monstrous.)
When this creature becomes monstrous, you
become the monarch. As long as this creature is monstrous, you can't lose the monarch.
As long as you are the monarch this creature has deathtouch and trample.