Wrong. The Stoneskin spell protects the RECIPIENT of the spell, not other spells stacked on the recipient of the person. Therefore, when one attack comes through to the recipient, ALL of the Stoneskins that the recipient has received, are decreased by one. Nice DMs (about as common as the well-known wooly mammoth) would perhaps allow that four Stoneskins cast on the same character would allow that character an automatic 4 on the 1d4, but that's me inferring things.

Wrong again. The description of the spell clearly states that the griffonwould reduce the spell by three per round, I quote: "regardless of attack rolls and regardless of whether the attack was physical or magical". Now, I would probably have the being attacking the Stoneskinned character roll more than 1 (we use the critical hit/failure rule), or hit AC 10 before the Stoneskin is decreased, but again; that is me inferring things. Now, also remember that the recipient probably wouldn't know that the Stoneskin spell was gone - the spell does not state anything about appearance, and therefore I suggest that there is none. An Int or Wis check might be in order to pick up the fact that the spell is gone... before the damage starts rolling in. After that, it is pretty obvious that the spell isn't working anymore...

A large number of missile attackers would reduce the Stoneskin immensely. If, say, 10 kobolds armed with darts would attack a Stoneskinned person, they would reduce the Stoneskin with 30 attacks per round. Regardless of THAC0 rolls. Characters like specialized dart throwers and the like would be pure poison for the spell.

Even though puncture poison or ingestive poison probably wouldn't work (I think it would be up to the individual DM to rule if ingestive poison counts as, say, one attack per round, or if it doesn't count as an attack at all...), contact poison probably will. Now, even if a weapon didn't do any damage, it might deposit contact poison. The DM might even rule that cocky recipients of the spell are automatically hit by the attack, as they do not make any effort to dodge it. Contact poison works through contact, and would, though it would perhaps not work immediately (though I rule that it does), definitely count as an attack per round. And unless the recipient washes off the poison, he or she could be in for a nasty surprise at the end of the spell... I actually used the contact poison approach once, and they nearly stopped using Stoneskin after the poison killed two characters and left a third unconscious. One of the two characters that bit the bullet (figuratively) was the resident cleric, so it took a long time before that unconscious character was conscious again.

This is an oft-used way of limiting the use of the spell. Actually, I am intrinsically opposed to this way of limiting the spell, but I add it to the list of ways around the spell for completeness' sake.

The Aurora's Whole Realms Catalogue states that the cost for 1/8th carat of diamond cost 150 gp - and the DM would of course be free to decide how much diamond is needed... perhaps 1/8 ct would be needed for Small, 2/8 ct for medium, and 3+/8 for large? 6 oz. granite dust cost 1 gp - and also here, the DM is free to decide how much granite dust is needed - but 1 oz. for Small, 2 oz. for Medium (and so on) would be in keeping with the suggested style of the diamond dust.

Remember that the character isn't physically stronger than normal because of this spell. Therefore, several persons or monsters working in concert would have little difficulty in overpowering a character protected with Stoneskin. And breathing water is normally rather difficult... Undeads commanded by an evil priest or intelligent undead would be partial to this one.

This is a variation of the above, where the character may be hung above abonfire or other implementation. Stoneskin may make the person tougher for a while, but the fire would eat through it in a matter of rounds... and then the person would be nicely done. Ogres would be partial to this one.

The Dungeoneer's Survival Guide (excellent, if a bit "esoteric" sourcebook, by the way) suggests that the Stoneskin spell would be able to negate abrasion and falling damage from falls. It is amusing how player character are falling off things all the time, isn't it? Now, however, the DM may be nasty and rule that all the tumbling and rolling down a slope would consist of, say, 1d4 attacks per round, and do it by the numbers. I, however, would merely rule that the Stoneskin was gone after landing - but negated all the damage. Obviously, I would not tell him that the spell was finished, but that's the way it goes... and it would typically not be something someone did more than once at any rate.

Thieves and rangers make traps all the time. There isn't much any character can do - protected by a Stoneskin or not - when he or she is hanging upside down, snared by a rope (or chain - tougher to cut through!) trap. Also, all sorts of fun games can be instigated - throw the rock at the Paladin, Who'll get the First Blood with clubs, and so on.

Well, let's pretend that the character was caught by all these jermlaines, see, and they decide to have fun. Only the character is protected by this nasty Stoneskin spell, see, and the jermlaines are sick and tired of bruising their fists on the character while the character is laughing at them. They dig a hole, dump the character in it, and fill it up again. And then, they spill some honey around where the character is. And the ants came forward. To make matters more interesting, they might be carnivorous. They would probably consist of no more than 1 attack per round, but they would still decrease the Stoneskin...

Imagine that you've got an acid which doesn't smell anything weird, looks like water, and you've got a bucket full of the stuff. You put it over a door, and wait for a Paladin to step through. He does so, and gets soaking wet. He doesn't know it's acid 'till it starts to burn, or 'till he notices that his clothes are smoking... He won't notice anything until his Stoneskin wears off - and might get a nasty shock then. Like, "You're soaking wet. What do you do?" And then, say, 10 rounds later, "You're starting to feel an itching sensation..." And then proceed to damage each round. Unless he connects the bucket with ... fun ... stuff with the damage, he will continue taking damage until he thinks of changing his clothes, taking a bath, what- ever. This might be cruel, but nevertheless... Of course, the insidious DM will be able to make countless variations on the 9 mundane options above.

Here we go for the magical variations. First, a word about magical weapons. Magical weapons which depend on a wound to work, will not work. The weapon itself will never cause any damage, but the special effects may still work. What I mean is - though a Vorpal Sword may not decapitate a person protected by a Stoneskin, a "normal" flaming sword will still burn the person protected by the Stoneskin... but the sword per se will not damage the Stoneskinned person. Weapons whose special effect may or may not work (taken from the top of my head - I am sure that you can find more if you go through the Encyclopedia of Magic, your copy of the DMG, or whatever):

- Sword of Nine Lives Stealing
- Sword, Flame Tongue (flame effect, mind)
- Sword, Frost Brand (Same as Flame Tongue)

1st level Wizard spells:

Audible Glamer   - distracting a person, luring them off the edge of cliffs
Charm Person     - obvious; if you can't beat them, join them
Color Spray      - same as Charm Person
Enlarge (r)      - make'em small, then kick them away
Magic Missile    - at high levels, this counts as a good amount of attacks
Phantasmal Force - same as Audible Glamer

Bind                      - incapacitating and distracting
Flaming Sphere            - lasts several rounds, worth many attacks
Hypnotic Pattern          - same as Bind
Improved Phantasmal Force - same as Audible Glamer
Melf's Acid Arrow         - lasts several rounds
Stinking Cloud            - same as Bind
Summon Swarm              - lasts several rounds, counts as many attacks

Dispel Magic          - pretty obvious, isn't it?
Flame Arrow           - worth several attacks
Hold Person           - incapacitating
Melf's Minute Meteors - worth a multitude of attacks
Sepia Snake Sigil     - incapacitating
Slow                  - impairs combat effectiveness
Spectral Force        - same as Audible Glamer
Vampiric Touch        - weakens opponent, counts as an attack, beneficial

Charm Monster           - if you can't beat them, charm them
Confusion               - incapacitating
Contagion               - heh
Emotion                 - hmm, can have interesting effects
Enervation              - evil one
Evard's Black Tentacles - this is a spell, remember?
Fire Charm              - incapacitating
Fire Shield             - Stoneskin, and goad your opponent to hit you
Fire Trap               - nasty on doors... and in a maze?
Hallucinatory Terrain   - there isn't really a pit there you know
Ice Storm               - the hailstorm variant is a multitude of attacks
Illusionary Wall        - disorienting
Phantasmal Killer       - it's all in your mind
Rainbow Pattern         - incapacitating
Stoneskin               - takes a thief to catch one
Wall of Fire            - attacks, and damages
Wall of Ice             - ice sheet, impedes progress

Advanced Illusion     - disorienting
Chaos                 - disorienting
Cloudkill             - Stoneskin doesn't protect against this
Hold Monster          - incapacitating
Summon Swarm          - worth many attacks
Summon Shadow         - saps Strength
Transmute Rock to Mud - incapacitating, drowning?
Wall of Force         - impedes progress
Wall of Iron          - impedes progress
Wall of Stone         - impedes progress

Anti-Magic Shell    - heh, now you're protected, now you're not
Death Fog           - obvious
Death Spell         - obvious
Disintegrate        - heh, you're a goner, literally
Eyebite             - this is evil
Geas                - so is this
Permanent Illusion  - as Audible Glamer
Programmed Illusion - even more effective
Project Image       - I am standing in front of your friend... NOT

Finger of Death     - obvious
Force Cage          - well, impedes progress at least
Mordekainen's Sword - again, doesn't protect against spells, remember?
Power Word Stun     - heh, you're stunned
Prismatic Spray     - incapacitating

Bigby's Clenched Fist     - impedes progress
Incendiary Cloud          - ouch
Mass Charm                - if you can't beat'em, join 'em
Otto's Irresistible Dance - heh, feel for a jig? Nasty for spellcasting
Power Word Blind          - now you see me, now you don't
Prismatic Wall            - yeah
Trap the Soul             - nasty doesn't begin to describe it

Bigby's Crushing Hand - well
Meteor Swarm          - large scale destruction
Power Word Kill       - death might not be too good for you
Prismatic Sphere      - untouchable, are we now?
Temporal Stasis       - impedes progress
Weird                 - heh, weird

Command  - yeah (my favourite? Defecate!)
Entangle - impedes progress

Charm Person or Mammal - join them
Fire Trap              - yeah, like, boom (Incidentally, I once used this spell for mines)
Flame Blade            - this is a spell, so it'll go right through Stoneskin
Hold Person            - scared stiff?

Dispel Magic     - obvious
Glyph of Warding - obvious
Summon Insects   - multitude of attacks from little bugs

Neutralize Poison (r) - heh, this would be nasty
Produce Fire          - is that your hair burning?
Spell Immunity        - you're immune to Stoneskin or something

Insect Plague         - I do so like bugs
Rainbow               - over the rainbow, skies are blue - bow version
Transmute Rock to Mud - this drowning sensation
Wall of Fire          - yeah

Blade Barrier  - this is created, so the damage's a part of the spell
Fire Seed      - creates missiles is the key word
Heal (r)       - does this Harm you?
Wall of Thorns - creates a barrier is the key word

Chariot Of Sustarre - going to hell in a handbasket, or chariot as the case may be
Confusion           - what do you wanna do?
Creeping Doom       - those bugs really bite, don't they?
Fire Storm          - always useful aren't they
Wither              - those things're gonna kill you
Resurrection (r)    - you're gonna be destroyed

As I've always followed guidelines similar to this one when I've encountered Stoneskin in any of my campaigns, I've never really had problems with the spell. Especially, I think, after the time I did the contact poison trick. (Evil grin? Me? Naah.)