I personally love Lord Shaxx’s one when he says
"What I wouldn't give to fight again beyond the walls. I would tear out a Vex heart with my teeth! I would sear the Cabal with my burning Light, challenge the Fallen Kells to personal combat and scatter them! I... I've been watching too many Crucible matches."
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“I don’t have time to explain why I don’t have time to explain.” Exo stranger