This belongs in the TIZ. as for your question, there is no Coal in ZOMG. if you're talking about the Coal-ossal Fail, it was a special event that ZOMG had during christmas.
That means if you want a Coal-ossal Fail you'd better just go buy one. http://www.tektek.org/gaia/price/6783/recipe:_coal_sprite http://www.tektek.org/gaia/price/index.php?p=6787 http://www.tektek.org/gaia/price/gaming/201/Coal-ossal_Fail
ZOMG will have special events every once and awhile where they release special recipes and special monsters/ways to get material to make the items. which will then disappear after awhile.