House of Imaginary Walls vs. magic and melee


Rules Discussion


House of Imaginary Walls bard cantrip wrote:
You mime creating an invisible 10-foot-by-10-foot stretch of wall adjacent to you and within your reach. The wall is solid to those creatures that don’t disbelieve it, even incorporeal creatures. You and your allies can voluntarily believe the wall exists to continue to treat it as solid, for instance to climb onto it. A creature that disbelieves the illusion is temporarily immune to your house of imaginary walls for 1 minute. The wall doesn’t block creatures that didn’t see your visual performance, nor does it block objects. The wall has AC 10, Hardness equal to double the spell’s level, and HP equal to quadruple the spell’s level.

What are limits to this? I know it doesn't block missiles weapons, alchemical bombs, and similar objects fired or thrown through it. That exception aside, however, note that this is unlike a usual illusion, which would not have any hardness or HP to be defeated by someone who believed it was real, all their attacks would just go through it if they came into contact.

So can an enemy spellcaster target me with a spell if he doesn't believe he has line of effect due to an invisible wall? For a normal illusion I'd say, but he wouldn't try because he'd expect it to be futile; for a damaging spell he might cast it at the wall like he would at a Wall of Force.

Can someone on the other side of the wall who has reach to me hit me with his weapon? Again, for a normal illusion the answer would be no, the weapon would pass through, but here I don't know how the object immunity applies. Is it an object for these purposes when attended? Do only natural attacks, and not weapons, hit and damage the wall? (I think the intent is probably that weapons do hit it, but I'm not that confident.)

Does an AOE like a Fireball stop at the wall and damage it because a caster thinks it's real? This one I'm least certain of. It's not an object and it's not a targeted spell subject to the caster's feelings on reality. Probably passes through?

Any dissenting opinions or ideas?


Bump for the daytime crowd.


I wish someone would help answer this.


For me, melee weapons don't go through. You are using it so it takes all the limitations of your own actions. Otherwise, it would generate weird effects as our items are always touching things before our skin. Like having your boots go through it while you climb on it.

For the Fireball, I'd consider that as an object. It's not RAW (but there's no RAW on it), but it's logical: you don't control the expansion of the burst, it's independant of your will.


I don't think that there is a definitive answer. There are a lot of things to adjudicate here. ALL I can really offer is opinion.

Those creatures that believe in the wall, would not target creatures on the other side of it, because they can't see them.
However, if their enemy is peering out from behind the wall, they might choose to target them. Against a cover bonus!?! The GM could go either way on whether or not to apply a cover bonus.

But there is nothing to stop them trying to destroy the wall. The GM should probably not allow it to affect creatures on the other side of the wall. The effect should simply miss them, or only have a small chance of splash damage

If they had a valid target a reasonable GM might allow then to use an area of effect attack. Which could potentially affect those behind the illusion as the wall is not really there.....

A reasonable GM will also stop players from trying any attack that the attacking character "believes" will have no effect, and also stop an attack againt the wall if the character has another way around.


Gortle wrote:

I don't think that there is a definitive answer. There are a lot of things to adjudicate here. ALL I can really offer is opinion.

Those creatures that believe in the wall, would not target creatures on the other side of it, because they can't see them.
However, if their enemy is peering out from behind the wall, they might choose to target them. Against a cover bonus!?! The GM could go either way on whether or not to apply a cover bonus.

But there is nothing to stop them trying to destroy the wall. The GM should probably not allow it to affect creatures on the other side of the wall. The effect should simply miss them, or only have a small chance of splash damage

If they had a valid target a reasonable GM might allow then to use an area of effect attack. Which could potentially affect those behind the illusion as the wall is not really there.....

A reasonable GM will also stop players from trying any attack that the attacking character "believes" will have no effect, and also stop an attack againt the wall if the character has another way around.

So, the created wall is invisible? So even if you believe the wall exists, it does not block line of sight. For my sanity, I'm assuming the wall is treated like a wall of force. e.g. Enemies would assume it is a wall of force and either work around it or attempt to destroy as they choose. Unfortunately, this assumption also means the wall won't make much of a ladder. It will be difficult to climb with invisible hand holds.


I've never run this particular spell, so just had to take a quick look at it. As stated above, it does appear that it would not block any spell or other form of ranged attack, but would stop physical contact through the wall as the believing creature can't physically reach past it.

This makes it only effective against melee or as an escape tool. Imaginary Wall a doorway and run out of sight before the enemy figures out what's going on, though this use is also questionable since the wall will only be around for 1 round.

That does seriously limit the utility of the spell. It would be one thing if it was opaque, but unfortunately it's invisible, so would do nothing against ranged opponents.

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