Stone ritual

A stone ritual is a special ritual performed with a stone painted in a specific magic way. It is then subject to a short ritual of the hands before it contains magic which it can automatically use to perform it's intended function. Usually many are used together in a specific shape such as an eight pointed star or a square/rectangle

defense/force field ritual: index fingers in x pointing straight up, separate them so that they are separate pointing straight up, lift arms slightly, move index fingers to horizontal pointing at stone, say spell, point index fingers towards each other so that they touch barely, pull apart