Fortune Worm

Fortune Worm is a trinket added in the initial release of Fiend Folio.

Effects

+0.2 shot speed.
+2 luck.
Isaac gains a luck-affected chance to fire fortune cookies that deal 1.05× damage and will display a random fortune on screen when hitting an enemy.

Notes

The chance to fire a fortune cookie tear is equal to: 1 / (22 − Basechance − Luck)
- Basechance is set to 1 for each character, except Fiend, who has it set to 5.
- The chance is capped at 1 in 3 chance to fire a fortune cookie at 18 luck (14 luck for Fiend).

Interactions

Trinket Multipliers: Increases shot speed by an additional +0.10 and luck by an additional +2 for every Trinket multiplier. Also multiplies the Basechance value with the total Trinket multiplier.
Leftover Takeout: Increases the Basechance to 18. Combined with the luck up both the trinket and item provide, this will effectively reach the 1/3 chance cap.
- Fiend + Leftover Takeout: Increases the Basechance to 22.
The Forgotten / Tainted Forgotten / Tainted Samson / Berserk! / Spirit Sword : Melee attacks will not have a chance to deal 1.05× damage or create a fortune when hitting an enemy.
Azurite Spindown: Using Azurite Spindown on Fortune Worm rerolls it into Bifurcated Stars.

Trivia

Fiend Folio adds an absurd amount of new fortunes, many of which are suggested by the community, making Fortune Worm a good way to discover them.

Trinkets
Normal Trinkets	Shard of China Bifurcated Stars Fortune Worm Fool's Gold Extra Vessel Chili Powder GMO Penny Molten Penny Bloody Sandpaper Red Ribbon The Right Hand Flea of Meltdown Flea of Deluge Flea of Pollution Flea of Propaganda Fuzzy Penny Fortune Grub Chunk of Tar Yin-Yang Orb Swallowed M90 Trinity Worm Jigsaw Puzzle Box IOU Autopsy Kit Spire Growth Flea Circus Jevilstail Dealmakers Solemn Vow Massive Amethyst Lost Flower Crown Angry Faic Sharp Penny Eternal Car Battery Pocket Dice Locked Shackle Petrified Gel Hatred Frog Puppet Tattered Frog Puppet Wackey Heartache Grabber's Enemy The Middle Hand Rainbow Bean Faulty Fuse Cursed Urn Shattered Cursed Urn Conjoined Card Energy Searcher Broken Record Fuzzy Pickle Fushigi Nesting Doll Egg Penny Leftovers Dud's Flower Bomb Token Top Rock
Rock Trinkets	Dirt Clump Rolling Rock Pocket Sand Rough Rock Bloody Rock Spiked Rock Slippy Rock Arcane Rock Mineral Rock Thorny Rock Time-lost Diamond Obsidian Grindstone God's Marble Twenty-Sided Emerald Technological Ruby 2.0 Leaky Rock Twin Tuffs Wetstone Stromatolite Ribbed Rock Fiendish Amethyst Sturdy Rock Brick Rock Sapphic Sapphire Blood Diamond Scented Rock Arcade Rock Tinted Heart Rose Quartz Hailstone Ramblin' Opal Sand Dollar Henge Rock Salt Lamp Molten Slag Thunder Egg Unobtainium Sandstone Fake Rock Citrine Pulp Bloodstone Emetic Antimony Double Rubble Rock from an Abyss Hector Vessel Rock Constant Rock Shooter Robot Rock Rock Candy Keystone Silver Tongue Meat Slab Sheep Rock Rebellion Rock Dad's Legendary Golden Rock Bedrock Sheetrock Fetal Stone Focus Crystal Oddly Smooth Stone Moonstone Limestone Carnal Carnelian Rebar Rock Dogrock Rock Stalactite Cast Gem Shard of Golgotha Smoky Quartz Twinkling Rock Rock Cake Charcoal Achilles Electrum Pure Quartz Amazonite Star Sapphire Gravestone Sand Castle Guarded Garnet Shamrock Gas Pocket Soap Stone Spirit Urn Sun Shard Steadfast Stone Insatiable Apatite Rai Stone Ore Penny Heavy Metal Grossular Sulfur Crystal A Bit of Trollite Throwlomite Hearthstone Magnetic Sand Power Rock Tiger's Eye Smaller Rock Nitro Crystal Shard of Golem Rock Worm Fool's Unobtainium Minichibisidian Friendly Rapid Fire Opal Hiddenite Lost Artifact Atlas' Burden Pocket Rock-it Wormhole Rock Ridiculous Metal Arachnite Homoerotic Ruby Gay Garnet Lithopedian Jesus Rock Chunk of Gallium Onion Rock Knife Pebble Teardrop Pebble Arrow Pebble Clover Pebble Shoe Pebble Fruity Pebble Grimlin Vomit Grimlin Wetstone Grimlin Constant Grimlin Broken Gaping Grimlin Brimlin Cross Grimlin Eye Grimlin Cauldron Grimlin Gaping Grimlin Trimlin Sensory Grimlin
Fossils	Breakfast Fossil Sack Fossil Coprolite Fossil Beeter Fossil Fly Fossil GMO Fossil Sword Fossil Fortune Worm Fossil Primordial Fossil Rerolligan Fossil Fossilized Fossil Fish Fossil Runic Fossil Canned Fossil Balanced Fossil Buried Fossil Trippy Fossil Max's Fossil Bomb Sack Fossil Death Cap Fossil Explosive Fossil Colossal Fossil Skuzz Fossil Fossilized Blessing Petrified Sock Molten Fossil Value Fossil Coral Fossil Necromantic Fossil Brain Fossil Refund Fossil The Left Fossil Thank-You Fossil Hollow Fossil
Geodes	Curved Geode Haunted Geode Health Geode Little Geode Quick Geode Webby Geode Lucky Geode Phlegmy Geode Lob Geode Sodalite Geode Placebeode Warm Geode Chain Geode Rusty Geode Fragmented Onyx Geode Quantum Geode Technological Geode Rubber Geode Calzone Geode Tough Geode Tipsy Geode Vinyl Geode Prismatic Geode Fractal Geode GMO Geode Swallowed Geode Voodoo Geode Umbilical Geode
Geode & Fossil	Geode Fossil

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Fortune Worm

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Fortune Worm

Effects

Notes

Interactions

Trivia