The Wall
From Destinypedia, the Destiny wiki
"The wall which stood for centuries along the southern border of Old Russia has collapsed, a battle-scorched reminder that our enemies still seek to destroy us all. Fallen mutants now scavenge the tombs of the Golden Age, and the plague they have unearthed in the wastes is more dangerous than even they understand. Join Lord Saladin. Journey into the Plaguelands. Learn the fate of the Iron Lords and stop the growing threat before it is too late."
