A Spark in Shadow

Head to the tunnels under Freehold on Mars and face down the Conductive Mind for your own source of Arc. Complete mission "A Spark in Shadow."
"The Vex are practical, focused. They store energy in all its forms. The Conductive Mind contains a powerful Arc source. Seek out this construct, destroy it, and claim the source as your own." - Ikora
Added In
The Taken King (2015.09.09)