Real fire transition prekeyed (it´s a physical effect not cgi), the flames rise until they fill all the frame, stay there for a while and then they descend.
You get two versions 1 with glow and other without glow (in case you prefer this or you want to add your own glow filter)
The music in the video preview is not included you can find it in this link:Epic Trailer
Drag this transition in your the timeline on top of your videos that´s it.
If you want a more brigther fire you can duplicate the fire layer like in the preview example and the second layer blend it by screen mode.
You can find another physical fire fx and trasitions here: