For the trigger, you can use a simple string or fishing line mechanism. Attach one end to the piston and the other to a small lever or button you've created. This will be what sets your trap in motion.
Never use a real piston, heavy springs, or anything that could hurt a person or animal. Keep flames away from dry decorations. And remember: the most important part is in the ritual’s power. A cardboard trap made with love can be as potent as any ancient relic — because the magic is in you, not just the mechanism.
Which of those would you like?
