What you will see is a Big Green Dragon floating around infront of you, while ur stuck on some small island out in the middle of nowhere. The Dragon will be shooting missles at you, Once a missle gets close, Time Stop a little before it hits you, Then Temporal Fist it back at the dragon, once time resumes and the missle hits the dragons shields will drop and then u blow it away, Repeat this till it gets to half life. It will then get closer to the island and breathe fire. Just dodge around it, if ur life gets low time stop and heal up, just dodge this till he stops and his shields will be down. Just keep dominating him with the disentegrator gun. Once he gets closer its pretty easy to put him down, When hes done breathing fire his shields will be down, Time Stop and Pull out the ion detonator and shoot and detonate all of them on to his face, then pull out the desintegrator gun and resume time and keep shooting, i droped him from half life to dead in 1 go with that techinique. Good luck