Evolved Gorgotha, also known as Mega Rainbow Gorgotha, has at least 50 health and 20 armor. His team pals are two Rockworms and an Ancient Horror.
One of the problems with using a control deck against this team is that looping builds can be slow starters. Since Gorgotha is prismatic and will accept any colour mana, should he fill up faster than you can it’ll be mostly Game Over.
So having either Ferit or Spider Queen or any mana-draining/ targetable silencing troop is essential to maintaining control over the board. Use your mana drain ability on Gorgotha any time he looks like he’s about to top up.
Gorgotha also has the most amount of life which makes him susceptible to damage from Shadow Hunter. Between Ferit and Shadow Hunter and a purple mana generator to keep them going, you’ll find that it only requires 2 or 3 shots from Shadow Hunter to finish off Gorgotha.
So the moral of the story is: Take out Gorgotha first. As a mana-generator he’s absolutely the most dangerous! Worry about the Rockworms later during mop-up.