Catharsis

A generic ritual, generally associated with Priests of Daevon, Galton, Alalvar (although other denominations have a lesser variant of such ritual) which allows the contamination associated with the footloose casting of Magickes to be incrementally removed. Catharsis takes time and tends to be purgative, unpleasant - but is absolutely and most certainly better than the alternative... which is to have the dreaded blight of cancerous Dissonance to emerge. And that may happen in any of thousands of truly truly undesirable ways.