Getting creative with Stone Shape or Why Druids can't know Math


Rules Questions


Stone Shape, a 3rd lvl druid spell whit only this limitation:

Target: stone or stone object touched, up to 10 cu. ft. + 1 cu. ft./level

I happen to have a druid in the party that knows his maths. Arguing that a 34'x1'x'1/2 stone segment is a valid target and extrapolating from there he can target huge areas of stone by minimizing it's width turning it into marbles.

By using marbles of about 1/10 of an inch he can cut throu 2040 ft2 of stone. He also says, that as it's not otherwise stated, the shape to alter could be irregular.

Now I have to say that our party isn't quite heroic really, so this guy keeps looking for castles to demolish and dams to breach (with 1/10 of an inch and 10 ft thick walls, he can make a hole 16ft wide on anything made of stone as long as there is something pushing the wall, water or gravity, we did the math). Our DM ruled a max to any dimension of about 1/10th of an inch when attempted to demolish "The Span" from Magnimar with an almost infinite molecule-width shape that would also sculpt statues of him on each pillar.

Isn't that a bit OP for a 3rd lvl spell?


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PRD wrote:

STONE SHAPE

School transmutation [earth]; Level cleric 3, druid 3, sorcerer/wizard 4
Casting Time 1 standard action
Components V, S, M/DF (soft clay)
Range touch
Target stone or stone object touched, up to 10 cu. ft. + 1 cu. ft./level
Duration instantaneous
Saving Throw none; Spell Resistance no
You can form an existing piece of stone into any shape that suits your purpose. While it's possible to make crude coffers, doors, and so forth with stone shape, fine detail isn't possible. There is a 30% chance that any shape including moving parts simply doesn't work.

Bold is mine, seems good enough reasoning to not allow super small objects.

It's the GM's option to interpret this though.

I have to say though that the guy sounds like a real pill to deal with. The attitude that "the rules DON'T say I cant do it means I can do it" is really stupid.

The rules also don't say that the GM can replace all of your dice with D4's for rolls, or that he cant make you play blind folded.


You'd have to define "fine detail" 1/2" is not a fine detail when dealing with sculptures.
The spell is clear, it's one object at a time, so no multi marble thing, only one contiguous piece of stone per casting.

Liberty's Edge

Blindmage wrote:

You'd have to define "fine detail" 1/2" is not a fine detail when dealing with sculptures.

The spell is clear, it's one object at a time, so no multi marble thing, only one contiguous piece of stone per casting.

And, BTW, that mean that you can't cut trough castle walls. Castle walls are made by relatively small pieces of rock mortared together, not by huge blocks of stone. The buildings made with huge blocks of stone are generally meant to be impressive pieces of architecture for propaganda purpose, not utility buildings. Depending on the area construction blocks can have a volume from 1-2 to 5-6' cubic feet. 1 cube foot weight something like 60 Kg (130 lbs) or more. A 6' cube can with upward of 400 kg. In medieval era that stuff was moved by human or animal strength. Even with cranes and block and tackles they were working with manageable sizes, not large stones.

BerinHardt wrote:


By using marbles of about 1/10 of an inch he can cut throu 2040 ft2 of stone. He also says, that as it's not otherwise stated, the shape to alter could be irregular.

2,5 mm? Decidedly fine detail. Same for the statue part.

And I really doubt that "the span" is made of stone. More like reinforced concrete as a minimum. And the spell don't affect artificial materials.


I like it.

I think the player is being creative and operating within the rules to achieve powerful non-combat effects with an interesting spell. If he's making the other players feel useless or ruining the GM's adventures, they can talk to them outside of a game and ask him to stop. But the fact of the matter is that any clever spellcaster is going to be very powerful, and they can be clever in much more abusive and much less fun ways than math-enhanced stone shape.

As for the legality of the method, it seems pretty much okay. As has been pointed out, the spell can't turn the stone into multiple objects, but he could fill something with so many holes that it will collapse under its own weight. The spell restricts him to fine detail, and the GM has ruled that limit to be 1/10 of an inch, so as long as he stays within that requirement and the volume affected by the spell he should be fine. Although he should probably take ranks in Knowledge (engineering) or a suitable Profession skill if he hasn't already, so that applying his own knowledge to his characters actions isn't metagaming.


You'd have to have sprue connecting the marbles, otherwise its no longer the same stone object

Sovereign Court

A 6' cube of sandstone is 216 cubic feet of stone, or 14.2 Metric Tons. My alchemist can drag half a dozen, but he's a beast.

Liberty's Edge

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BerinHardt wrote:
By using marbles of about 1/10 of an inch...

I don't know why, but using 1/10 of an inch as a measurement really bothers me. Usually you have either 1/10 of a centimeter, or a millimeter, or you have an 1/8 or 3/32 of an inch. This mixing of metric and imperial measurement seems like some kind of unholy abomination.

sorry, I do a lot of measuring in my job


Diego Rossi wrote:
...More like reinforced concrete as a minimum...

Off topic; is there any evidence of reinforced concrete in Golarion, or hydraulic cement? The world is interconnected enough to support the required infrastructure hydraulic cement needs, but with the availability of magic strengthening methods the incentive structure might not be there.


DM Livgin wrote:
Diego Rossi wrote:
...More like reinforced concrete as a minimum...
Off topic; is there any evidence of reinforced concrete in Golarion, or hydraulic cement? The world is interconnected enough to support the required infrastructure hydraulic cement needs, but with the availability of magic strengthening methods the incentive structure might not be there.

Why not both? Cold iron rebar would physically reinforce the concrete while providing a very effective focus for the abjurations on the structure.


DM Livgin wrote:
Diego Rossi wrote:
...More like reinforced concrete as a minimum...
Off topic; is there any evidence of reinforced concrete in Golarion, or hydraulic cement? The world is interconnected enough to support the required infrastructure hydraulic cement needs, but with the availability of magic strengthening methods the incentive structure might not be there.

Romans had it around 100 bc, and golarion is WAY ahead of that. Judging from the rate of fire of the gunslingers they're up to ww1 tec at the least..

]


DM Livgin wrote:
Diego Rossi wrote:
...More like reinforced concrete as a minimum...
Off topic; is there any evidence of reinforced concrete in Golarion, or hydraulic cement? The world is interconnected enough to support the required infrastructure hydraulic cement needs, but with the availability of magic strengthening methods the incentive structure might not be there.

Alchemical cement


At 5hp per cubic foot, building anything from that is so much more expensive than using stone, but it would stop any earth control or stone shape tricks to get past it.


Cold iron rebar, the corrosion resistant material we wish we had.

Funny enough, the cost on alchemical cement is about right for what the Greeks used hydraulic cement for: sealing larger basins to protect them from water damage.

Yes, hydraulic cement pre-dates the Romans! But the Romans were the first to build structures out of it.


The object created has to fit within (10+level) one-foot-across contiguous cubes where each cube is touching 4 corners to 4 corners. That's RAW and RAI.


whew wrote:
The object created has to fit within (10+level) one-foot-across contiguous cubes where each cube is touching 4 corners to 4 corners. That's RAW and RAI.

In the spell description it speaks of making crude doors, at lvl 5 under those constraints you could make a 3' x 5' door. It is possible that is what they intended, but maybe the intended to allow you to make a 4" thick door that can block a 5' x 12' hallway? But that very ridged interpretation does match how some other spells are done, like the oracle blizzard ability.

Liberty's Edge

Note that you only shape existing materials, you don't remove or create them.

Liberty's Edge

Deighton Thrane wrote:
BerinHardt wrote:
By using marbles of about 1/10 of an inch...

I don't know why, but using 1/10 of an inch as a measurement really bothers me. Usually you have either 1/10 of a centimeter, or a millimeter, or you have an 1/8 or 3/32 of an inch. This mixing of metric and imperial measurement seems like some kind of unholy abomination.

sorry, I do a lot of measuring in my job

OFF TOPIC - It's not mixing metric and imperial, it's just breaking the imperial units into more useful subdivisions. Any time you use precision measuring tools (micrometers, calipers, etc) you have to use decimal subdivisions. I work for a US based medical device manufacturer and many of our products have tolerances of +/- .001" (one thousandth of an inch). When you're working with fine details, standard fractional subdivisions just don't work.


darth_gator wrote:
Deighton Thrane wrote:
BerinHardt wrote:
By using marbles of about 1/10 of an inch...

I don't know why, but using 1/10 of an inch as a measurement really bothers me. Usually you have either 1/10 of a centimeter, or a millimeter, or you have an 1/8 or 3/32 of an inch. This mixing of metric and imperial measurement seems like some kind of unholy abomination.

sorry, I do a lot of measuring in my job

OFF TOPIC - It's not mixing metric and imperial, it's just breaking the imperial units into more useful subdivisions. Any time you use precision measuring tools (micrometers, calipers, etc) you have to use decimal subdivisions. I work for a US based medical device manufacturer and many of our products have tolerances of +/- .001" (one thousandth of an inch). When you're working with fine details, standard fractional subdivisions just don't work.

Also way off topic, for over a decade I have cringed at the kpsi unit at work, yes that is kilo pounds per square inch.


BigNorseWolf wrote:
You'd have to have sprue connecting the marbles, otherwise its no longer the same stone object

I would not even allow that given that the spells examole is a "crude coffer" not 10000 marbles with an interconnected sprue. It's asking way too much.


BigNorseWolf wrote:
DM Livgin wrote:
Diego Rossi wrote:
...More like reinforced concrete as a minimum...
Off topic; is there any evidence of reinforced concrete in Golarion, or hydraulic cement? The world is interconnected enough to support the required infrastructure hydraulic cement needs, but with the availability of magic strengthening methods the incentive structure might not be there.

Romans had it around 100 bc, and golarion is WAY ahead of that. Judging from the rate of fire of the gunslingers they're up to ww1 tec at the least..

]

The setting also has people using ancient Greek swords (falcata) against late Renaissance armour (full plate). I don't think real world comparisons are a great idea.


I think of Stone Shape as allowing the caster to mould stone as if it were soft clay (and that they had very large and quick hands to complete the shaping in 1 std action). That allows the caster to push, pull, press, squeeze the stone into a desired shape. They can create an opening by pushing apart the stone or close an opening by spreading the stone across the gap. Whilst some might claim that once separated the piece of stone becomes two, it can be easily countered by pushing one side away from the other so that the stone bulges outwards instead of connecting.

In my view it would certainly allow the caster to reshape a bridge or arch so the keystone no longer fitted and the whole collapsed or to push the foundations to one side so that a wall was unstable. I also see nothing in the spell description that limits it to natural stone and would find it very difficult to argue that concrete and mortar were immune to the effects.


PRD wrote:

STONE SHAPE

School transmutation [earth]; Level cleric 3, druid 3, sorcerer/wizard 4
Casting Time 1 standard action
Components V, S, M/DF (soft clay)
Range touch
Target stone or stone object touched, up to 10 cu. ft. + 1 cu. ft./level
Duration instantaneous
Saving Throw none; Spell Resistance no
You can form an existing piece of stone into any shape that suits your purpose. While it's possible to make crude coffers, doors, and so forth with stone shape, fine detail isn't possible. There is a 30% chance that any shape including moving parts simply doesn't work.

A lot of marbles is not any shape, but many shapes.

The way I have seen this done is by reshaping a this slab into a ball. The slab is removed from its original location, and the ball is next to it. The slab could even be a doughnut shaped slab, leaving a hole in the wall, with the extra stone filling it but able to be pushed aside.

/cevah

The Exchange

BerinHardt wrote:
... this guy keeps looking for castles to demolish and dams to breach (with 1/10 of an inch and 10 ft thick walls, he can make a hole 16ft wide on anything made of stone as long as there is something pushing the wall, water or gravity, we did the math)...

"Your druid is found dead in his room. Or at least most of him is. The only clue to the killers' identity is that he was bludgeoned to death with a bricklaying hod, the body hacked apart with masonry trowels, and the eyes gouged out with an architect's compass. The town guard investigate closely, before concluding that it was death by natural causes."

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