dave2008
Legend
Well, like I said some monsters do have magic immunity. The first was Tiamat, but she isn't the only monster. That works similar to old school MR without the dice rolling!I feel it doesn't go far enough. Many spells have an effect even on a successful save, and no monster is invulnerable to that, no matter how much it would make sense for them to be. It's similar to my issue with resistance, in that I feel DR worked better to represent a "lesser immunity" where small amounts of damage are ignored, as opposed to the half or nothing approach of 5e.
I like cantrip immunity as a concept though.
I've used the two in combo to give some monsters really beefy magic resistance. Give them immunity to spells of 3rd level or less and resistance to all of them. Stuff like that.