5 cups of Midori
8 cups of Vodka
20 cups of Ginger Ale
2 cups of Water

All measurements are approximate. Adjust to your own taste. Mix well. Pour into your cauldron, preferably with chunks of dry ice to create the bubbling steam effect. (Be careful NOT to drink or eat or in any way come in direct contact with skin with any chunks of dry ice - you can get burned by the extreme cold!).