Wild elf unique trait (hunter's elegance, because spotted is not a unique thing, just standard resistances) is awfully niche, i dont think there are much oppurtunities to draw use from it.
So i thought of a different idea.
According to lore, they have magic that purifies water so heres the idea
Description- purify a 3x3 square of dark water/whirlpool terrain to make bright/pure water
Ideas for pure water:
1.Opposite of dark water, increases faith instead of nullifying it.
2.Consume the tile to remove a debuff from an ally that passes over it