Blue Sand

The sand was originally red, but it turns blue due to the magic of the Great Beast. The Aasimar Zombies and the PCs can draw on this magic to cast spells without using spell slots. When this is done the sand turns red in a five foot diameter around them (or one space if a mat and figurines are being used). It takes about 6 hours for the sand to turn blue again. Overuse of the sand for powering magic has bad effects on PCs (see PC Sand Use) but the players shouldn't be allowed to know this until they start seeing the consequences.