Hey i have not heard of it but from what i read when invoking the elements is that it is best to do one at a time at least for safety reasons. I would especially not recommend trying something like invoking fire and water at the same time or even the same day because of the nasty backlash that the two have. I have learned from experience to never invoke fire and then take a shower after because i had a throbbing headache and felt horrible for the rest of the day. I am sure that if you were to invoke both these elements at the same time or even right after one another, the effects could be worse than just a nasty headache. Hopefully this answers your question in some way and that i could be of some help.
HAIL SATAN!!!
HAIL ALL DEMONS OF SATAN!!!
I'm not sure if this is the same thing, but when I'm in the shower I like to envision myself taking the steam into my body. I view it as the perfect combination of fire and water. It helps me retain the heat throughout the day and keep the emotional, positive effects water gives me. I hope that helps? I'm sorry if I caused further confusion.
