I want to say that a message was heard through the sky and I want to use the word "call" for it. Now I want to know if it needs an article or not.(contable or uncountable)
"The knife was sharp but it didn't work! Then a heavenly call was heard that there is no need to sacrifice your..."
"The knife was sharp but it didn't work! Then a heavenly call was heard that there is no need to sacrifice your..."