The funny thing is that was an easy question and the Prophet's bane is a weapon in Halo 5.
English
-
Damn. Well, I know literally nothing about Halo 5, because I don't plan on getting an xbox one. Oh well, I tried, and I didn't cheat.
-
Lol, it's an Energy-Sword type power weapon.
-
Well, that does make sense. Arby totally impaled the prophet in 3, so, of course, the "prophet's bane" is a sword. Nice one, 343.