User blog comment:Omega natsu2/Chapter 353: Exorcism, Predictions./@comment-5840892-20130920172728/@comment-5840892-20130921174009

Who said God Slayers can't make NORMAL Elements as well?

Maybe there's a Spell an Ice God Slayer uses that makes Normal Ice. Plus Chelia's a God Slayer, and her Sky God Healing Magic is not a Black element. Maybe the God Slayers only have Black Elements for spells based around attacking.