hey team, while we gear up in this raid, let's brush aside the basics and talk spas. initially, when spas launch new treatments, they often provide a preexplanation of their techniques and formulas. now, for the real quest, tell me about any prohibited techniques or secret formulas that were initially praised but are now forbidden, starting from the outset. this way, we can ensure we're not stepping into any banned magic zones that could get us booted from paradise.