Talk:Hystrix/@comment-27508208-20180421112132/@comment-4448946-20180421223127

What you're missing is that this is, in fact, acting identically to Acrid.

What do I mean?

Well Acrid actually deals Toxin damage, and had a separate forced Toxin proc unrelated to is damage. This means that adding an Electric damage mod gives you Corrosive damage and the Toxin proc is unaffected.

On Hystrix, there is no Elemental damage, there is only the forced elemental proc. So, when you add an Electric damage mod, there is no other elemental damage for it to combine with and it starts Electric damage. As the elemental proc is forced and has a predetermined element it is, just like Acrid, unaffected by elemental mods.

TLDR: Both weapons have forced elemental probs would predetermined elements that are unaffected by what damage type they're dealing. On both weapons, when you apply an Elemental damage mod it combines with any other elemental damage but doesn't affect the forced proc.