Talk:Mods 2.0/@comment-71.32.249.8-20130330185918/@comment-6301973-20130330191352

it almost sounds liek two questions. you can upgrade any mod with any mod. how a mod upgrades depends on the mod being fused. warframe abilities will increase different stats depending on the ability. the abilities should tell you what they increase with level up by displaying a tool tip when the curser is held still over a ability mod while in the fusion menu