Answer: There is no way to kill. Buy your Dynamica or be a miserable target for those with Dynamica.
This kind of questions should be but places in ~Suggestion thread, so I'm moving it. Notice every dragon in release day can kill every opponent and is undefeatable. After some time i think there will be heroes which will be able to defeat it.
Now you can only use heroes which ignore damage cap, and deal very high damage. Silencing it may help but up to 50% hp. After that you need heavy cannons to defeat it. Also check YouTube cause there could be answer there.
The new dragon is just Zeph 2.0, just a bit more specialised against dmg cap hero. If your attack team doesn't rely heavily on dmg-cap hero (DK, lava, Zeph) then the new dragon is actually less threatening than Zeph. They do the same number of hits per sec, but Zeph do true dmg. Dynamica dmg-cap are conditional and he doesn't have any negative buff (paralyzed, freeze, etc). All he has is a sh# load of boost from being an epic hero. If you can kill Zeph then you should be able to kill dynamica.