Turning 15, Will challenges Blood to a fight with real swords as his coming-of-age ceremony, but Gus asks Will to lose on purpose. Will doesn't get a chance to ask Gus about what happened that day in the ruins before he must head into his battle against Blood.
That happens because I betrayed 
the earth-mother Mater.
يحدث هذا لأنّني خنتُ أمّ الأرض ماتر
Isso acontece porque eu
traí a mãe-terra, Mater.