Iocane Powder was a deadly toxin from Australia. It has no smell, no flavor, and dissolves instantly in liquids. Ramsley carries a small bottle of the toxin and uses it to poison a goblet of wine. This is the manner in which he murders Master Gracey's bride-to-be, Elizabeth Henshaw. Later in the film, Ramsley uses iocane to poison the ceremonial wine so that Sara Evers will die and return as a ghost to end the curse.

Trivia

  • The powder is a fictional poison originating from The Princess Bride.


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Disney Parks
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Media
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Books: Tales from the Haunted MansionThe Haunted MansionDisney Kingdoms: The Haunted MansionKingdom Keepers
Video games: Adventures in the Magic KingdomThe Haunted MansionWalt Disney World ExplorerKinect: Disneyland AdventuresDisney Infinity: 2.0 EditionDisney Crossy RoadDisney Emoji BlitzThe Haunted Mansion: The Black Widow Bride

Characters
Ghost HostMadame LeotaCaretakerMaster GraceyHatbox GhostHitchhiking GhostsThe Singing BustsGeorge HightowerConstance HatchawayRavenCaptain GoreLittle LeotaOrganistThe Coffin OccupantTightrope WalkerThe BridePickwickThe MarinerPrudence PockBluebeardDeathThe ExecutionerDuelistsGramsAlexander Nitrokoff

Phantom Manor: Melanie RavenswoodHenry RavenswoodMartha Ravenswood
Mystic Manor: Henry MysticAlbertCaptain Mary OceaneerMaestro D'ElfmanThe Monkey King Statue
Haunted Mansion Holiday: Jack SkellingtonOogie BoogieLock, Shock and BarrelSallyZeroThe Vampire Teddy-BearZero • The Giant Snake • The Man-Eating Wreath • The One hiding under your bed • Skeleton Reindeer
The Museum of the the Weird: The Mistress of Evil • The Candleman • Madame ZarkovThe Grandfather Coffin Clock
Characters from Spinoffs: Elizabeth HenshawRamsleyEmmaEzraJim EversSara EversMegan EversMichael EversZombiesZeke Holloway • Friendly Ghosts • Atticus ThornAmicus ArcaneDanny CroweMaxwell KeepMelody KeepRoland Keep

Miscellaneous
Grim Grinning Ghosts • Gracey Manor • The Flying DutchmanThe Ghost Relations DepartmentTarot CardsIocane PowderBeacon of Souls • Bravery Tonic • Mumbo Doll • Soul GemsSeaman's Ring • Brotherhood of the Soul • Order of Shadows • Mystic Manor Theme SongThe Sinister 11
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