It was a cold winter day. fresh snow covered the streets and buildings of the small town, and people hurried up and down the streets, their breath misting in the air. A beautiful woman with long silver hair walked down the street wearing a red dress, hardly enough coverage for the freezing winter day. People gave her odd looks. No one noticed that her breath did not mist the air.
She walked until she found a busy public space, a square with a fountain. and approached it. Looking around, the woman hopped up onto the fountain, and held out her hand. Crystal formed in the air, and slashed down her wrist, spilling her blood. It ran from her arm, faster than a normal cut, into the water, turning the fountain red. People noticed, and some stared. Some came to help.
Tendrils of blood rose up from the water, and as the woman turned to meet the eyes of the closest person, she smiled. And clicked her fingers. Those tendrils shot out, spearing peoples bodies. Crystal formed on the ground, shooting up to skewer and maim. In seconds, she'd dropped twenty bodies, and as people screamed and started to flee, she dropped more.
Helena looked around the fountain at her work, and smiled. "Who will come sniffing, to this little party?" She asked the icy air. The cut on her wrist scabbed over, and she waited.