In my project i decided to create a superhero gadget called imaginary gift. It is two cards one white and another black. The white card holds power which is like mana and can be used for spells. The black card is eternal which keeps the power replenished. if they are separated then you cant use them. And it can only be used for30minutes without recharging and it takes25 minutes to recharge. My superhero will use it for good. I could have designed it better