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Message: <blockquote data-quote="Gadget" data-source="post: 6685441" data-attributes="member: 23716">Good points, but I'm not sure the cantrip can create an 'wall' big enough for the entire party to hide behind.  There is a limit on the size of the illusion.  Now, I personally would allow something of roughly the same square footage, i.e. a closed door in an opening that is taller than allowed, but narrower and thus about the same area.  I understand that the original example was designed to give the halfling continuous advantage, which I think is a bit beyond the pale.  IMHO, this trick could work to give surprise in an ambush situation, and the eye holes would not be necessary as the halfling has already interacted with/investigated it and could see through it just fine.  I might also allow, depending on the situation, one attack from the halfling at advantage (so I may be with you there), but after that the game is up and the enemy has 'seen' the halfling jump out of the box and can now perceive it as an illusion.  Maybe, if the halfling was sniping at the enemy from a distance inside the illusory box, I might require an investigation/perception check on the part of the enemy to determine where the arrows/bolts are coming from; once they see arrows shooting out of a solid box, the game would be up.  There is a reason why the invisibility spell makes you visible as soon as you attack or cast a spell, and I don't feel it is an 'in fiction' reason; the spell would just be too powerful otherwise.  So I would be very careful about allowing a cantrip to be a poor man's invisibility That being said, it is nice to see some imaginative use of spells, but what is imaginative and successful once, can become a tactic de jour that gets trotted out every. single. combat.  I still remember the days of: "I cast 'Create Water', on his lungs" or "the spell's name is 'Grease', so it must burn like Greek Fire if we toss a torch in there right?"  And the ever useful: "Throwing sand in his eyes worked well, lets just carry a pouch of sand around and use it all the time".  So I would not allow Minor Illusion to create a glowing, pointing arrow over an opponent to give advantage on the parties' attacks, for a silly example, as that would really make Fairie Fire seem kind of pointless.</blockquote>

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