iserith
Magic Wordsmith
My favorite thing to do as a player is throw a fairly damaging cantrip with a save on the monster and then ask the DM if they want to use legendary resistance if they fail the save. A lot of times the DM wants to save those for when there's some kind of control effect that really messes up the monster. So when they fail a save against my decently damaging toll the dead or whatever, they have to choose to just eat that damage or burn a legendary resistance at the risk of not having that available later to save against hypnotic pattern or the like. I find that to be a fun dynamic.