I dreamt about TEF last night.

There was this butterfly released into the forest, a really big, blue butterfly that couldn't go any faster than a walking deer. But this butterfly was associated with bad things apparently, because whenever it got near the other deer, they'd all scramble away. Then I realized that if the butterfly got close enough to cast a spell on you, you became the butterfly and the original one went back to being a deer. It was so weird...

Sounds like it would be a fun game though, like tag. But being a butterfly for too long would get annoying, I suppose.