5e Clerics pick a path based on their god's domain, which gives them bits as they level up. None of them quite fit Vorn--Grim, grey god of iron and rain, so I made this custom path.
-Bonus proficiencies w/martial weapons & heavy armor.
-When you get hit with a melee attack from a (non-magic) metal weapon, the attacker must make a Dex check or their weapon rusts beyond use. You can use it once per point of Wisdom mod until you rest.
-You take half damage/effect from storm, lightning or thunder of any kind.
-Rain cannot touch you.
-Rusting Grasp a number of times per day=Wisdom mod.
-You can intensify any rain into a torrential downpour.
-You may ignore the damage from a metal weapon a number of times per day = to your Wis mod. Other rust abilities affect magic weapons on a failed item save.