Xanthor, Lord of Fire

Creatures you control have berserk. (They enter the battlefield tapped and attacking, with a +1/+1 counter on them.)
"The dragons before me were weak. Bolas, Chromium, all of them. They thought they were immortal, unstoppable. I am not either one, but I
am enough to extinguish what is left of
humanity!"-Xanthor