Power Girl #6 Cover B Brad Walker Card Stock Variant

The citizens of Metropolis are missing! Looking for an escape, many have fallen victim to Avalon, a new street drug that transports you to a simpler era...the Medieval Times! And turns out that it's not just a trip you take in your mind, people are being physically transported to this magical plane too! Looks like a job for Power Girl and her new bff, Supergirl?!