Ferocious Tree Titan

{3}{u}{r}{g}: Monstrosity 4(If this creature isn't monstrous, put 4 +1/+1 counters on it and it becomes monstrous)
When Ferocious Tree Titan becomes Monstrous, it fights target creature an opponent controls.
"Not even Stelaar had the courage to fight this massive beast." - a Raelu storyteller