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Message: <blockquote data-quote="Plane Sailing" data-source="post: 1063688" data-attributes="member: 114">For a more direct reply in the spirit of the question - d20Modern has a whole range of special weaknesses for supernatural creatures, and you could find some useful ones amongst themFrom the SRDCreature WeaknessesAlthough a creature’s type and species determine many of its traits and abilities, GMs are encouraged to alter a creature’s physiology, behavior, abilities, tactics, and defenses when it serves the story or to confound players who think they know everything about their opponents. The rules provided allow GMs to build custom monsters and ascribe special qualities to them. When designing a creature, the GM should also think of ways the creature can be defeated.  From the heroes’ point of view, a creature’s weaknesses are more important than its abilities.  Assigning weaknesses to creatures gives under-powered or poorly equipped heroes a fighting chance.Table: Sources of Weakness lists many sources to which a creature may be vulnerable. A source can be a specific object, location, substance, sound, sensation, or activity. How the creature interacts with a source of weakness is left up to the GM, although most sources must be in close proximity to the creature (if not touching the creature) to affect it. GMs may roll randomly on the table, choose a source that suits the creature, or devise their own.Source EffectsAfter determining a creature’s source of weakness, the GM needs to decide how the creature reacts when confronted by the source.  Pick an effect that seems appropriate for the creature and the source.A creature gets either a Fortitude or Will saving throw to overcome or resist the source of weakness; the DC of the save varies depending on the source’s strength:Strength of Source    Save DCEasily resistible    10Moderate        15Strong            20Overpowering        25Creatures usually react to a source of weakness in one of six ways:Addiction: The creature is compelled to ingest, imbibe, or inhale the source. The source must be within 5 feet of the creature to affect it. On a successful Will save, the creature negates the compulsion. On a failed save, the creature spends a full-round action indulging its addiction, then may resume normal actions while suffering one or more of the following effects (GM’s choice):• Creature takes a –2 penalty to Dexterity and Wisdom.• Creature takes a –2 penalty on attack rolls and skill checks.• Creature loses 10% of its current hit points.• Blindness: The creature has a 50% miss chance in combat, loses any Dexterity bonus to Defense, moves at half speed, takes a –4 penalty on Strength and Dexterity-based skills, and cannot make Spot checks. Foes gain a +2 bonus on attack rolls to hit the creature.• Deafness: The creature takes a –4 penalty to initiative checks and has a 20% chance of spell failure when casting spells with verbal components. The creature cannot make Listen checks.• Creature loses one of its extraordinary, supernatural, or spell-like special qualities.Each effect lasts 1d4 hours. Even creatures immune to mind-affecting effects are susceptible to a source-induced addiction.Attraction: The creature is compelled to move as fast as it can toward the source. On a successful Will save, the creature resists the compulsion. On a failed save, the creature moves toward the source at its maximum speed, taking the safest and most direct route. Once it reaches the source, the compelled creature seeks to possess it. If the source isn’t something the creature can easily possess, it gets a new save every round to break the compulsion.Even creatures immune to mind-affecting effects are susceptible to a source-induced attraction.Aversion: The creature finds the source repellant. On a failed save, the creature cannot approach or remain within 1d4 x10 feet of it. In the case of traveling sounds, the creature moves away from the source as fast as it can, stopping only when it can no longer hear it. On a successful Will save, the creature overcomes its aversion and may approach the source freely.A repelled creature that cannot move the requisite distance from the source suffers one or more of the following effects (GM’s choice):• Creature takes a –2 morale penalty to Strength and Dexterity.• Creature takes a –2 morale penalty on attack rolls, damage rolls, and skill checks.• Creature takes a –2 penalty to Defense.• Blindness: See Addiction, above.• Deafness: See Addiction, above.• Creature loses one of its extraordinary, supernatural or spell-like special qualities.Each effect lasts until the creature leaves the affected area and for 1d4 rounds afterward. Even creatures immune to mind-affecting effects are susceptible to a source-induced aversion.Fascination: The creature finds the source fascinating and ceases all attacks and movement upon seeing, hearing, smelling, or otherwise perceiving it. On a successful Will save, the creature negates the fascination and can act normally. On a failed Will save, the creature can take no actions, and foes gain a +2 bonus on attack rolls against the creature. Any time the creature is attacked or takes damage, it gets a new save to negate the fascination. Otherwise, the fascination lasts as long as the creature can see, hear, smell, or otherwise perceive the source.Even creatures immune to mind-affecting effects are susceptible to a source-induced fascination.Fear: The creature is frightened by the source. If it fails its Will save, the creature flees from the source as fast as it can. If unable to flee, the creature takes a –2 morale penalty on attack rolls, weapon damage rolls, and saving throws. On a successful save, the creature overcomes the fear and can approach the source or otherwise act without penalty.Even creatures immune to mind-affecting effects are susceptible to a source-induced fear.Harm: Contact with the source or proximity to the source harms the creature in some fashion. On a successful Fortitude save, the creature negates the effect or, in the case of instant death or disintegration, takes damage instead. GMs may choose one of the following effects or invent their own:• Blindness and deafness: See Addiction, above. The blindness and deafness last 1d4 hours.• Creature loses all of its supernatural and spell-like special qualities.• Creature is turned to stone instantly.• Creature loses 50% of its current hit points.• Creature drops dead. On a successful save, the creature takes 3d6+15 points of damage instead.• Creature is disintegrated. On a successful save, the creature takes 5d6 points of damage instead.Even creatures immune to effects that require Fortitude saves are susceptible to source-induced harm.Table: Sources of Weaknessd%    Source01    Alcohol or moonshine02    Amber03    Animated cartoons04    Archways05–06    Bells or chimes07    Books written by William Blake08    Bunnies09–10    Cancerous organs11    Carbonated soft drinks12–13    Cats14    Chrome15–16    Classical music17    Clocks18    Clowns19    Cocaine20–21    Country music22–23    Crosses or crucifixes24    Crows25    Dogs26    Elvis Presley memorabilia27    Fast cars28    Fast foods29–30    Fluorescent lights31    Games of chance32    Gold or iron pyrite (fool’s gold)33    Grave dirt34–35    Heavy metal music36–37    Holy symbols38–39    Holy water40    Hospitals41    Ice cream42    Insecticide (DDT)43    Jack o’-lanterns44    Keys45–46    Laughter of children47    Laundry detergent48    Lavender49    Lilac-scented candles50    Mathematical equations51    Morphine52–53    Nerve gas54    Nitrous oxide (laughing gas)55    Novocaine56–57    Number “8”58    Pearls59    Penicillin60    Photo flashes61–62    Plastic or vinyl63–64    Played violin or electric guitar65    Playgrounds66–67    Plutonium68    Poppies69    Pulsing strobe lights70–71    Radiation72    Radio waves73    Rubber74    Running water75–76    Silver77    Sodium benzoate (food preservative)78–79    Sodium chloride (salt)80–81    Specific phrase or word82    Specific song83    Spoken Latin84    Stuffed animals85    Sumerian or Egyptian hieroglyphs86–87    Sunlight88–89    The Bible90    Tinfoil91–92    Toxic waste93–94    Triangles95    Television infomercials96    Television static97–98    White rice99–100    X-rays</blockquote>

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