Here's some optional sorcery rules if you want to break genre conventions to give WEIRD characters an extra oomph : you can roll 1d6, 2d6 or 3d6, and you need to reach a certain TN to achieve effects. The more conditions (freeform stuff like shedding blood, sacrifices, the stars being right or using certain components) you have, the lower the TN. The magickier the spell, the higher the TN. Standard TN is 7, and high powered stuff should be above 12. Rolling a natural 6 means some minor mishap happens like all your food rotting. 66 means some major mishap happens, like you puke a misshapen, fast-growing clone of yourself which will run off into the woods screaming and stalk you later. 666 means some massive fuckup, you tear open a portal to the 5th dimension and giant tentacled beasts try to steal you away.