Talk:Bane of Grineer/@comment-88.156.153.176-20131016071708/@comment-10743657-20131016102027

It increases all damage. To put it simply, after you've calculated your damage, this multiplies it by 1.3. If you're curious about the exact order, see here: http://warframe.wikia.com/wiki/User_blog:Mad5cout/Warframe_Damage_Calculation_Research#Faction_Damage