Have checked several times now and know have killed every headless one especially the times it says 10 and waiting on boss to spawn yet triumph says zero for everything so idk what's up also the upgrade ticket is a joke and idk why you would buy it bc they don't even give anything near as good as last event which wasn't great then
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The triumph requires you to hit all 15 of them, if your team kills 15 but you only shot 14 you dont get progress