sometimes an idea turns Bad. it happens if the idea is upset for too long, or feels unhappy with its purpose, or something interrupts it doing its purpose. maybe it just gets a resentful thought stuck in it. maybe it's been too idle. too lonely, or had to deal with too many people

when this happens the idea turns Bad and becomes its own opposite. Bads are very powerful and dangerous and scary, and all the other Ideas in the community have to work together to dismantle the Bad's scheme before it can ruin things. when defeated, the Bad will reform as the original Idea.

all Ideas know they'll turn Bad sometimes, and their friends will come and beat them up until they're normal. and then later they'll beat up one of their friends that went Bad. that's just life!