Issues with Lava texture

I am had some issues to use the emission node. I am trying to use Cycles, instead of Eevee, but I got some issues with shader to RGB, witch doesn´t exist on cycles. So, how can I use emission node with eevee or cycles. Do you have some tutorial or article to send me?

I have already obtained a satisfactory volcanic stone, but my lava does not shine or emit any light. It only gets the color stronger or weaker.