Could probably got for a heroic question. Haven't read too much into the lore, but could have a crack at legendary.
English
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Heroic: Recite the [i]Writ of Union[/i] Legendary: Why is Sgt. Johnson immune to the effects of the flood?
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Legendary: Johnson has a condition called Borens syndrome which was caused from taking in too much radiation while using plasma grenades defending Paris IV giving his troop enough time to evacuate.