Sydd's page

I'm talking about those feats that Necromancer Wizards, Clerics, and Bones Mystery Oracles can all use without needing archetypes or anything. I think that Undead Bloodline Sorcerers should also be able to pick them up because of lore reasons. It just makes sense to me.

The following feats are available to some spellcasters

who have the ability to create or control undead minions.
If you’re a different class but can create or control undead
and can cast at least one necromancy spell, the GM might
give you access to these feats.

The closest thing i found so far is the Elementalist Class Archetype. It gives access to some metamagic feats that add elemental trait to your spells.

Dousing Spell points out that by adding the water trait from the metamagic feat, it counts for weaknesses and resistances.

You enhance your spell with elemental water, soaking the target. If the next action you use is to Cast a Spell targeting a single creature, you soak the target of the spell with water. If the target has persistent acid or fire damage, the DC to end those conditions is reduced to 10, and the creature can attempt a flat check to end those types of persistent damage immediately. The spell gains the water trait (causing it to deal extra damage to creatures with weakness to water).