Pseudodragons, for one.
There may be others.
I don't remember where I saw it, but if I recall correctly, something grants Advantage to Saving Throws vs Magic.
I can't remember if it was a class feature,
race feature,
feat,
or what.
Is anyone able to refresh my memory?
Being a Gnome (for Wisdom, Intelligence, and Charisma saves only)
Having an Imp or Pseudo dragon with a familiar contract (not from the Warlock Pact of the Chain)
Are we talking about saving throws vs. spells or saving throws vs. magic? Because in 5e, those are two completely different things, and it looks like several posters are getting them mixed up.