Earlier today I was battling an opponent and it was a 2 for 2 scenario. Needless to say i swap in Dracocera only to be greeted with a full health Trago. Needless to say I knocked its health down to 375 health with the attack. He tried the instant invincibility and I ended up acute stunning. This persisted a few times with it getting a crit which I healed right off the back. The final time it did the instant invincibility and with me acute stunning them, the shield dropped and I managed to rampage it and got the victory.
Side note: I know some people will flame me for my post earlier today. Just to set the record straight, I rarely use Dracocer in battle. Yes I keep it on my team just in case I am in a clinch.