Deriving from the ancient belief that Prayers, when said backwards, were a curse. Fantasy has adapted this into almost a tradition in magic, that spells forward will represent normal magic, and said backwards will bring about dark magic/evil. I've always preferred to go by this, and use backwards spells for my evil characters, and forward for my good ones. Anyone else follow this, or just wing it?
As well as latin for some spells, or even made-up words. But most backwards here.
What's everyone elses spellery preference?