Board Thread:Character Discussion/@comment-25823557-20150929002100/@comment-25926288-20150929005553

That was likely Emma's magic. Emma's magic is the sparky electris stuff. It happened when she hit Emma, not when Emma pushed Lily, so it had to be because Emma got angry and sparks started flying.

Lily herself is just a regular powered witch (once she learns some spells) with loads of darkness.