Talk to Zavala

Speak to Zavala in the Hall of Guardians at the Tower.
"Heh. Nothing like that moment when you bring the Fist down. Sometimes, in the Crucible, I like to have my helmet cam running. That way, I can go back and see the whites of their eyes just before everything goes 'zap.' " —Wei Ning
Added In
The Taken King (2015.09.09)