Scourge of Winter
From Destinypedia, the Destiny wiki
Scourge of Winter is a story mission that takes place in the northern area of the Ishtar Sink on Venus. It has the player's Guardian assault a Fallen Ketch in order to assassinate Draksis, the Kell of the Fallen House of Winter.
The Guardian takes them all out.
Walking outside through the Cinders, the Guardian finds a docked Ketch next to the cliffs.
Several dozen Fallen guard the massive ship; some on patrol, some dropped off from Skiffs. The Guardian eliminates them all, making their way inside the Wintership Simiks-Fel.
The Guardian pushes through more Fallen infantry, making their way deeper inside. After navigating several hallways, they find Drakisis' Throne Room, the Kell standing over his throne.
The Guardian quickly assassinates Draksis and his guard.