Sundial Slipway, Mercury
The Guardian activates the Sundial and is teleported to the Corridors of Time.
Corridors of Time
Saint-14: I've killed enough of you to end a war. And you took my Light. I guess that makes us even. What are you waiting for? Last words? Finish it, you cowards.
The Guardian traverses the Corridors of Time, defeating the Vex which they encounter. The Guardian enters a portal.
Infinity's Siphon, Mercury
The Guardian searches for Saint-14.
Ghost: Now, where are we? Let's see… Topographical readouts match near-present Mercury. This is before I found you. And after Saint-14 launched his last mission to find Osiris…
The Guardian finds Saint-14.
Saint-14: Guardian, you're back! Just in time. I was about to send my Ghost away! I'm afraid that Martyr Mind has taken my Light. But now that you're here, these Vex are do— [strained grunting]
Agioktis, Martyr Mind appears and captures Saint-14 in a Vex trap. The Guardian fights against Agioktis, Martyr Mind and the Vex which appear.
Saint-14: Now that you're here, perhaps I will survive today after all!
Saint-14: Like a monster!
Saint-14: I would ask you how my father fares, but I would rather ask him myself.
Saint-14: Save some Vex for me, my friend! I'm trapped, not dead!
Agiotkis, Martyr Mind retreats and a Shackled Minotaur appears. The Guardian fights against the Shackled Minotaur and the Vex.
Saint-14: Once I get out of this stupid trap… We will crush them together!
Saint-14: You are even more vicious than I remember!
Saint-14: Very aggressive! I like that!
Saint-14: Run, little Vex! Run away! [laughs]
The Guardian defeats the Shackled Minotaur and deposits the Arc Charge which appears. Another two Shackled Minotaurs appear. The Guardian defeats the Shackled Minotaurs and deposits two more Arc Charges.
Saint-14: Two for one!
Agioktis, Martyr Mind traps the Guardian. Saint-14 is freed from the Vex trap.
Saint-14: I can feel the Light in my bones! Martyr Mind! Time to die!
Saint-14 summons a Void shield and defeats Agioktis, Martyr Mind. The Guardian is freed from the Vex trap.
Saint-14: It's been a long time, my friends. I've chased your memory for centuries. You should go now. Those who could kill me are dead. You've made sure of that.
Ghost: And what if the Vex take your Light again?
Saint-14: Impossible. It cost them everything to build the Martyr Mind. When you crushed it, they were doomed.
Ghost: You want us to leave you? You'll be stuck here for years.
Saint-14: You've both done plenty. Just open the Infinite Forest gate for me. I'll meet you the long way around, at the entrance.
Saint-14 turns around and sees more Vex spawning into the area.
Saint-14: What's a few more years of fighting Vex?
The Guardian is teleported out of Infinity's Siphon.