So, we (should) all know that it's a stupid and likely deadly idea to try to bring a bag of holding into a portable hole, or another BoH. However, l had a thought: Would this also count for the extradimensional spaces created by Demiplane & Magnificent Mansion? I know the M9 brought a Boh into their MM, but was that just Matt House-ruling?
The wording of MM specifically calls it a "extradimensional dwelling", and the wording of Boh says "Placing a bag of holding inside an extradimensional space created by a handy haversack, portable hole, or similar item instantly destroys both items and opens a gate to the Astral Plane."
It does specifically say items, not spells, so maybe not, but l want others opinions on the matter.
Demiplane is, in my opinion, NOT an extra-dimensional space, it is another, smaller plane, (similar to Leomund's Secret Chest). It's like going to the Astral plane, or the elemental plane, or even the Abyss, not an extra-dimensional space.
Mord's Mansion says it is an extra d space, I would have to rule it blows up a BOH.
Would Mordenkainen design his instant mansion so that he couldn't bring in his favorite bag of holding or portable hole where he likes to store loot from his adventures? No.
In addition, the wording of the effect is "an extradimensional space created by a handy haversack, portable hole, or similar item" .. are the mansions or demiplanes items? No .. then they don't interact with any of these extra planar storage devices.
So, no, I don't think the statement about extradimensional spaces can be generalized to extradimensional spaces - only spaces produced by items.
However, I think genie warlocks would need to be careful with their "Genie's Vessel" - "Bottled Respite. As an action, you can magically vanish and enter your vessel, which remains in the space you left. The interior of the vessel is an extradimensional space in the shape of a 20-foot-radius cylinder, 20 feet high, and resembles your vessel."
The vessel is an item producing an extradimensional space so a genie warlock probably could not use it to store their bag of holding.
However, I think genie warlocks would need to be careful with their "Genie's Vessel" - "Bottled Respite. As an action, you can magically vanish and enter your vessel, which remains in the space you left. The interior of the vessel is an extradimensional space in the shape of a 20-foot-radius cylinder, 20 feet high, and resembles your vessel."
The vessel is an item producing an extradimensional space so a genie warlock probably could not use it to store their bag of holding.
Interesting. Though, that could be ruled as a class ability, not the effect of a item.
I'm pretty sure that, unless an extradimensional space or the like has a clause like the Bag of Holding's in its description, it doesn't go boom. The clause is what makes the item similar. The vagueness of the clause is because other items of extra storage can always be added, you there's no way to have an exhaustive list.
I think it's easier to think about if you consider the purposes of the varying exradimensional spaces. Bag of Holding and friends expand your ability to carry stuff. If you could nest them, things get very silly, very quickly.They're also freely accessible. Magnificent Mansion and the like are places you enter, stay for a time, and leave. Even if you can use them for long-term storage, you don't have free access to the space.
I think that the rule is there specifically to prevent nesting of Bags of Holding, especially since Artificer Infusions can let you create a Bag of Holding at the end of a long rest from Level 2 onward.
In an extreme example of this, as an Artificer is limited to the number of active infusions they could have, and a DM could rule away the availability of multiple Bags of Holding, since a single Bag of Holding has a carrying capacity of 500lbs and weighs 5lbs, it the rule wasn't there, you could have 100 Bags of Holding inside a single Bag of Holding, making the carrying capacity 50,000lbs. That would mean that you could carry 2,500,000 coins in that 1 bag of nested Bags of Holding. Considering an Ancient Dragon's hoard is recommended to contain, on average 210,000GP and 42,000PP, a party that could nest Bags of Holding could conceivably have the hoards of about 10 Ancient Dragons on them, weighing 5lbs to carry.
The new Bastion Rules would let a 9th level character with an Arcane Study construct a Bag of Holding ever 10 days for 200GP each, so you could get into the range of the extreme example above after about 3 years and only 20,000GP, if the rules didn't have the annihilation clause.
I think that the rule is there specifically to prevent nesting of Bags of Holding, especially since Artificer Infusions can let you create a Bag of Holding at the end of a long rest from Level 2 onward.
This. The rule predates Artificers, but still, This.
If in doubt, I would just consider whether the effect, created by spell, item, or other, is meant to be a storage space - to carry something outside of your carrying capacity - or not. Rope Trick, Mordenkainen's Magnificent Mansion, Daern's Instant Fortress, etc? You are going to be entering personally with all of your equipment and leaving the same. It's fine, extra-dimensional or not. Anything left inside gets dumped when the effect ends.
I don't think there are still Gloves of Storing, but if they allowed whisking away a bag of holding, then astral rifts are fair game.
If you want to exploit multiple bags of holding or portable holes, feel free, but you will need pile them on your local Nodwick rather than layer them one inside of another.
So, we (should) all know that it's a stupid and likely deadly idea to try to bring a bag of holding into a portable hole, or another BoH. However, l had a thought: Would this also count for the extradimensional spaces created by Demiplane & Magnificent Mansion? I know the M9 brought a Boh into their MM, but was that just Matt House-ruling?
The wording of MM specifically calls it a "extradimensional dwelling", and the wording of Boh says "Placing a bag of holding inside an extradimensional space created by a handy haversack, portable hole, or similar item instantly destroys both items and opens a gate to the Astral Plane."
It does specifically say items, not spells, so maybe not, but l want others opinions on the matter.
Demiplane is, in my opinion, NOT an extra-dimensional space, it is another, smaller plane, (similar to Leomund's Secret Chest). It's like going to the Astral plane, or the elemental plane, or even the Abyss, not an extra-dimensional space.
Mord's Mansion says it is an extra d space, I would have to rule it blows up a BOH.
Would Mordenkainen design his instant mansion so that he couldn't bring in his favorite bag of holding or portable hole where he likes to store loot from his adventures? No.
In addition, the wording of the effect is "an extradimensional space created by a handy haversack, portable hole, or similar item" .. are the mansions or demiplanes items? No .. then they don't interact with any of these extra planar storage devices.
So, no, I don't think the statement about extradimensional spaces can be generalized to extradimensional spaces - only spaces produced by items.
However, I think genie warlocks would need to be careful with their "Genie's Vessel" - "Bottled Respite. As an action, you can magically vanish and enter your vessel, which remains in the space you left. The interior of the vessel is an extradimensional space in the shape of a 20-foot-radius cylinder, 20 feet high, and resembles your vessel."
The vessel is an item producing an extradimensional space so a genie warlock probably could not use it to store their bag of holding.
Interesting. Though, that could be ruled as a class ability, not the effect of a item.
I'm pretty sure that, unless an extradimensional space or the like has a clause like the Bag of Holding's in its description, it doesn't go boom. The clause is what makes the item similar. The vagueness of the clause is because other items of extra storage can always be added, you there's no way to have an exhaustive list.
I think it's easier to think about if you consider the purposes of the varying exradimensional spaces. Bag of Holding and friends expand your ability to carry stuff. If you could nest them, things get very silly, very quickly.They're also freely accessible. Magnificent Mansion and the like are places you enter, stay for a time, and leave. Even if you can use them for long-term storage, you don't have free access to the space.
I think that the rule is there specifically to prevent nesting of Bags of Holding, especially since Artificer Infusions can let you create a Bag of Holding at the end of a long rest from Level 2 onward.
In an extreme example of this, as an Artificer is limited to the number of active infusions they could have, and a DM could rule away the availability of multiple Bags of Holding, since a single Bag of Holding has a carrying capacity of 500lbs and weighs 5lbs, it the rule wasn't there, you could have 100 Bags of Holding inside a single Bag of Holding, making the carrying capacity 50,000lbs. That would mean that you could carry 2,500,000 coins in that 1 bag of nested Bags of Holding. Considering an Ancient Dragon's hoard is recommended to contain, on average 210,000GP and 42,000PP, a party that could nest Bags of Holding could conceivably have the hoards of about 10 Ancient Dragons on them, weighing 5lbs to carry.
The new Bastion Rules would let a 9th level character with an Arcane Study construct a Bag of Holding ever 10 days for 200GP each, so you could get into the range of the extreme example above after about 3 years and only 20,000GP, if the rules didn't have the annihilation clause.
This. The rule predates Artificers, but still, This.
If in doubt, I would just consider whether the effect, created by spell, item, or other, is meant to be a storage space - to carry something outside of your carrying capacity - or not. Rope Trick, Mordenkainen's Magnificent Mansion, Daern's Instant Fortress, etc? You are going to be entering personally with all of your equipment and leaving the same. It's fine, extra-dimensional or not. Anything left inside gets dumped when the effect ends.
I don't think there are still Gloves of Storing, but if they allowed whisking away a bag of holding, then astral rifts are fair game.
If you want to exploit multiple bags of holding or portable holes, feel free, but you will need pile them on your local Nodwick rather than layer them one inside of another.
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My houserulings.
IMHO it depends whether it is an item or an environment:
Bag of Holding, Handy Haversack, etc. => magical storage container item
Magnificent Mansion, Genie Vessel etc. => magical living space environment
You can bring a container item inside your living space environment, but a storage container in storage container => kaboom
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Still such an arbitrary rule. It has always felt like a solution looking for a problem.