So, now that you know the answer to the question when to cast a protection spell on someone, what exactly should you be casting the protection spells like protection from water, fire, and earth as well. The easiest way to cast these spells would be to just find the person or location that you want protected, then focus all your mental power and energy in protecting them from whatever harm that might come their way. This is an extremely powerful way to protect yourself and your loved ones, so, whenever you're casting a protection spell on someone, always remember to think about the person's life and how it will be affected by your power. Always use caution, and don't forget to follow the laws of your country in casting spells!