I need ideas on how to make a Godzilla cake that looks like its blowing blue flames. Would you use isomalt for the flames? How would you get the shape?

isomalt will give a person gastric problems -- try this:

https://www.lorannoils.com/icicle-candy-r0195

WOW!!   I often wondered how they did that.  Thank you Sweetcakester for asking and thank you K8memphis for your response.

This was amazingly helpful to me as well, thank you Sweetcakester and K8memphis!  Also... Sweetcakester.... my 11 (soon to be 12) year old son is a huge Godzilla fan, so I know exactly what you're talking about, and hope you will post pictures of your final creation!