Could it be possible in the future that the more you use a type of damages (poison for example) ,you get some passive resistance enhancement( you would gain an amount of poison resistance in that case).
Interesting idea, but would it not (at some point) render other immunities (from components and buffs, for example) pointless or powerful (combined with the immunity) to the point of making your character too immune to various types of attack and certain creatures?
It would require some balance stuff yes , but for me it would be logical that if you deal tons of poison damages you get nearly immuned.
I can’t imagine human torch from fantastic 4 being threatened by fire attacks.