Chaosmancer
Legend
It's been the most popular Bard cantrip in games I've run - and I've had a surprising number of bards, some parties even with two of 'em at a time. You get to insult things to death. It's hard to compete with that on the cantrip end of things. As has been pointed out, it's pretty good on the mechanical side, too.
That's honestly one of my only complaints with the cantrip. How the heck do I work in something literally dying from being insulted. It's hilarious on one hand, but I can't ever come up with a good rationale for it. Except suicide, which tends to be a downer at the table.