I love it.

"25 words or less delivered over as long as 10 minutes"

This just makes me want to be a jerk and have a series of Magic Mouths that deliver clues to how to navigate a maze that are all false unless you sit there for 10 minutes for the secret last part of the clue that guides you on the correct path. You could also set a separate Magic Mouth to key off a word spoken at the end of the 10 minutes so they would never hear unless they waited in the room long after they think the message has finished. This is definitely a spell (like Glyph of Warning) that can do a whole lot more than it would first appear.

ya know you can easily make a alibi with this spell.

all you need to do is get a bunch of beads and cast magic mouth on each bead with simuler triggers of "wile im not present and -blank- happens say -blank-" and string those beads together into something that looks like a  religest prare beads and presto all you need to do is lock the door leave the beads and go out the window to do what ever you need to do that is "defiantly not agents the law" but every one will think you are in your room all that time just remember to go back in the room veva the window.

Bro, this spell can be made into a programming language. And it's only second level. WTF

Thank you for the idea, the hall of maddening each brick having the spell cast on it. Mocking the adventurers each step of the way

H4C3RM4N

My DM and I are both fans of Jujutsu Kaisen and so he let me combine the cantrip 'Thaumaturgy' and 1st level spell 'Command' to make my own version of Cursed Speech (a characters technique). Now with this spell I can remotely trigger a command from anywhere.

This is from illusion school but is it an illusion spell for illusory reality? 

This spell is broken. Make the trigger "a true statement is said" and the response "So true!". Sit there saying random statements for an hour and now you know everything about the campaign. AT LEVEL 3. AT THE COST OF 10 GP.

Quote from AccursedGnome >>

This spell is broken. Make the trigger "a true statement is said" and the response "So true!". Sit there saying random statements for an hour and now you know everything about the campaign. AT LEVEL 3. AT THE COST OF 10 GP.

I as the DM would rule that because you are the one casting the spell and the magic is relying on your knowledge and intent, it cannot be used to know anything your character doesn't know. The description says the trigger has to be based on visual or audible conditions that occur within 30 feet of the target, which implies that is the limit of what the spell itself can perceive. It otherwise has no way of accessing information it cannot perceive.

If the trigger was given as "a true statement is said", I would rule that it only responds to statements that the caster already knows to be true.

I cannot believe they just wrote "a trigger" and called it a day. what does that mean? this thing is tapped into the entire multiverse

Oxford dictionary lists it as one word. Its not in Merriam-Webster's dictionary because Webster doesn't include words that are rarely or never used in a sentence.

Could a spellcaster cast Magic Mouth on their body, with the trigger for the spell being their death as a way to make their own corpse speak? Because a corpse is an object, however while you're alive you're considered a creature.