Saint-14 needs your help synchronizing the Mars Obelisk with the one in the Tower. First, you must reset the Mars Obelisk to realign its connection.
Reset the Mars Obelisk by completing a timelost weapon bounty from that obelisk.
"Osiris says the Warmind Rasputin is housed on this planet. Be careful with him. A Warmind sees the world very differently than a Guardian does—or so I hear." —Saint-14