Through A Mirror, Darkly

What lies behind a reflection?

Powers have filled the world with both heroes and villains.  Helen, despite her own powers, had acquired the name Sanddollar but stayed out of the fights.

When the enigmatic chess masters create a mirrored world reflecting her own home and the world about it, it's not so easy to escape.  All the more in that the people of that world are a dark reflection of all those she knows.