The Garden's Spire
Seize control of the Black Garden Spire held behind the wall of the Cabal Warbase on Mars and wake the Gate Lord's Eye. Complete mission "The Garden's Spire."
"The energy of a Vex spire on Mars. A tall order, just by itself. But our best bet is a Vex spire in the middle of a Cabal camp? That's ... well, honestly, that's not the weirdest thing we've had to do. Let's get it done."
- Ghost