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Mystery Egg

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Font TeamMeat M.pngFont TeamMeat y.pngFont TeamMeat s.pngFont TeamMeat t.pngFont TeamMeat e.pngFont TeamMeat r.pngFont TeamMeat y.png   Font TeamMeat E.pngFont TeamMeat g.pngFont TeamMeat g.png
Item icon
Item altar
 
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Table dividing line 2.png
 
Treasure Room Treasure Room
Greed mode only Treasure Room Treasure Room
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(page 5, column 14, row 3)
 
Mystery Egg Spawn three charmed enemies in the same roomMystery EggMystery Egg
Added in Afterbirth †

Mystery Egg is an unlockable passive item added in Booster Pack #5.

Effect[edit | edit source]

  • Spawns an egg familiar, which cracks and turns into a random friendly enemy when Isaac is hurt.
    • The egg regenerates upon entering a different room.

Notes[edit | edit source]

  • The usefulness of the enemy depends on how many rooms have been cleared without getting hurt.
Number of rooms / waves cleared Monsters
0 to 1 rooms cleared without taking damage Black Fly, Attack Fly, Maggot, Spider, Dip, Embryo, Nerve Ending
2 to 4 rooms cleared without taking damage Moter, Pooter, Swarm Fly, Level 2 Fly, Full Fly, Horf, Sucker, Dart Fly, Big Spider, Guts, Hopper, Gusher, Round Worm, Heart, Gush
5 to 7 rooms cleared without taking damage Squirt, Ragling, Homunculus, Level 2 Spider, Small Baby Long Legs, Wall Creep, Nightcrawler, Ulcer, Ministro, Mulligan, Hive, Nest, Flaming Hopper, Gaper, Cyclopia, Skinny, Dople, Globin, Maw, Psychic Horf, Tumor, Fatty, Half Sack, Clotty, Charger, Brain, Conjoined Spitty, Buttlicker, Host, One Tooth, Baby, Dukie, Black Globin's Body, Black Globin's Head, Para-Bite
8 to 10 rooms cleared without taking damage Splasher, Boom Fly, Keeper, Fat Bat, Psy Tumor, Imp, Fred, Cod Worm, Lump, Swinger, Bony, Black Globin, Null, Begotten, Knight, Bone Knight, Blubber, Conjoined Fatty, Oob, Leech, MemBrain, Wizoob, Mr. Maw, Flesh Death's Head, Mushroom, Blind Creep, The Thing, Blister, Leaper, Hanger, Poison Mind, Fistuloid, Tar Boy
11 to 13 rooms cleared without taking damage Gurgle, Walking Gut, Black Bony, Black Maw, Camillo Jr., Bloodshot Eye, Roundy, Mom's Hand, Mega Clotty, Swarmer, Fat Sack, Mobile Host
More than 13 rooms cleared without taking damage Red Ghost, Rage Creep, Vis, Gurglings, Dinga, Portal

Synergies[edit | edit source]

  • BFFS! BFFS!BFFS! Icon.pngIncreases the size and damage of familiars.: The enemy spawned will be a champion variant and egg grows in size.
    • Even if the enemy spawned cannot be a champion under normal circumstances, they will become a champion. For example, a spawned Dip can become a Red champion while a Round Worm can become a Green champion.

Interactions[edit | edit source]

  • Holy Mantle Holy MantleHoly Mantle Icon.pngAutomatically negates first taken damage in every room.: Losing the Mantle will not cause a friendly enemy to spawn.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

Bug[edit | edit source]

Bug Bug! When using Extension Cord Extension CordExtension Cord Icon.pngBeams of yellow electricity flow between Isaac and his familiars, damaging any enemies between them. with Mystery Egg, after the egg turns into a friendly enemy, the electricity shoots out into a random corner of the room.
Bug Bug! When egg turns into a friendly Heart (Mask + Heart) will sometimes act as the heart companion for a mask already in the room resulting in an unbeatable room.

Gallery[edit | edit source]


Moving Box Icon.png Booster Packs Moving Box Icon.png
#1
  • Angry Fly Icon.png
    Angry Fly
    Spawns a fly familiar that orbits around a random enemy and deals 5 damage per tick to enemies it comes in contact with.
  • Black Hole Icon.png
    Black Hole
    Throws a black hole on the ground which sucks in and damages enemies.
  • Bozo Icon.png
    Bozo
    Increases damage by a flat 0.1 and grants a soul heart. Enemies can randomly become briefly charmed or feared. Taking damage has a chance to spawn a rainbow poop.
  • Broken Modem Icon.png
    Broken Modem
    Enemies, enemy shots, tears, and pickups will briefly freeze in place at random intervals.
  • Mystery Gift Icon.png
    Mystery Gift
    Upon use, spawns a random item from the current room's item pool, with a chance to spawn A Lump of Coal or The Poop instead.
  • Sprinkler Icon.png
    Sprinkler
    Upon use, spawns a sprinkler that rotates and fires tears.
  • Fast Bombs Icon.png
    Fast Bombs
    Grants 7 bombs and allows bombs to be placed rapidly.
  • Buddy in a Box Icon.png
    Buddy in a Box
    Grants a familiar with a random tear effect. The familiar is randomized at the start of each floor.
  • Lil Delirium Icon.png
    Lil Delirium
    Grants a familiar that transforms into another random familiar every 10 seconds.
  • HairpinHairpinFully recharges Isaac's active item upon entering a boss fight.
  • Wooden CrossWooden CrossGrants a Holy Mantle shield upon entering a new floor, which protects against one hit of damage.
  • Butter!Butter!Using an active item will drop it onto a pedestal on the ground. Taking damage may result in dropping a passive item.
  • Huge GrowthHuge GrowthMakes Isaac large for the current room, increasing his range and damage.
  • Ancient RecallAncient RecallSpawns 3 random cards.
  • Era WalkEra WalkFor the current room, enemies are slowed, Isaac's speed is increased, and his shot speed is decreased.
#2
  • Jumper Cables Icon.png
    Jumper Cables
    Grants an active item charge every 15 enemies killed.
  • Coupon Icon.png
    Coupon
    Upon use, makes a random item from a shop, devil deal, or black market free.
  • Telekinesis Icon.png
    Telekinesis
    Upon use, for the next two seconds, any enemy shots that come near Isaac are held in place. After the charge is depleted, they are fired back as tears.
  • Moving Box Icon.png
    Moving Box
    If the box is empty, picks up all items and pickups in a room and stores them. If the box is not empty, places all stored items and pickups in the current room.
  • Technology Zero Icon.png
    Technology Zero
    Connects Isaac's tears with electricity that can damage enemies.
  • Leprosy Icon.png
    Leprosy
    Upon taking damage, grants a body part as an orbital, which blocks enemy shots and deals 7 damage per tick to enemies it comes in contact with. The orbitals will be destroyed if they take enough damage from enemies or enemy shots.
  • Filigree FeatherFiligree FeatherAngels drop items instead of key pieces when defeated.
  • Dressing Table.png
#3
  • 7 Seals Icon.png
    7 Seals
    Grants a random Harbinger familiar that changes every 10 seconds.
  • Mr. ME! Icon.png
    Mr. ME!
    Summons a controllable ghost that can perform various tasks depending on what it targets.
  • Angelic Prism Icon.png
    Angelic Prism
    Grants a prism orbital with a large orbital radius. Tears that pass through the prism split into four multi-colored tears.
  • Pop! Icon.png
    Pop!
    Replaces Isaac's tears with eyeballs that can bounce off of each other. The eyeballs are not limited by range, and will instead dissipate when they stop moving or when hitting an enemy or obstacle.
  • Door StopDoor StopThe last door Isaac went through stays open, allowing him to leave the room even if enemies are in it.
#4
  • Death's List Icon.png
    Death's List
    Grants a reward if all enemies in a room are killed in the order they are marked.
  • Haemolacria Icon.png
    Haemolacria
    Tears are now fired in an arc. Upon hitting the floor, an obstacle, or an enemy, they burst into many smaller tears in all directions. Increases tear delay.
  • Lachryphagy Icon.png
    Lachryphagy
    Isaac's tears decelerate as they travel. Upon stopping or hitting an obstacle, they burst into 8 tears in all directions. Tears can be fired into other tears to feed them, increasing their damage.
  • Trisagion Icon.png
    Trisagion
    Tears are replaced with piercing white blasts of light.
  • Schoolbag Icon.png
    Schoolbag
    Allows Isaac to hold two active items.
  • Extension CordExtension CordBeams of yellow electricity flow between Isaac and his familiars, damaging any enemies between them.
  • Cross Grimace.png
  • Fistuloid.png
  • Gush.png
  • Soul Sucker.png
  • Tar Boy.png
  • Tube Worm.png
#5
  • Blanket Icon.png
    Blanket
    Grants one soul heart. Upon entering a boss room, grants a shield that blocks one hit, then disappears.
  • Sacrificial Altar Icon.png
    Sacrificial Altar
    Upon use, sacrifices up to 2 familiars and spawns an item from the Devil Room Pool for each familiar sacrificed.
  • Lil Spewer Icon.png
    Lil Spewer
    Spawns a random pill, and grants a small Spewer familiar that charges up and fires different types of creep.
  • Marbles Icon.png
    Marbles
    Spawns 3 random trinkets. Taking damage has a small chance to swallow Isaac's currently held trinket, gaining its effect permanently.
  • Mystery Egg Icon.png
    Mystery Egg
    Spawns an egg familiar, which cracks and turns into a random friendly enemy when Isaac is hurt. The egg regenerates upon entering a different room.
  • Flat Stone Icon.png
    Flat Stone
    Tears bounce off the floor. Tears that hit an enemy after bouncing deal splash damage to all nearby enemies for 25% of Isaac's tear damage.
  • Marrow Icon.png
    Marrow
    Grants one bone heart and spawns three red heart pickups.
  • Slipped Rib Icon.png
    Slipped Rib
    Spawns a bone familiar that circles around Isaac and reflects enemy shots.
  • Hallowed Ground Icon.png
    Hallowed Ground
    Spawns a white poop familiar, which turns into a white poop when Isaac is hurt.
  • Pointy Rib Icon.png
    Pointy Rib
    Spawns a bone familiar that can be aimed with the fire buttons and does contact damage.
  • Book of the Dead Icon.png
    Book of the Dead
    Upon use, spawns a friendly Bony or an orbital bone for each enemy killed in the current room.
  • Dad's Ring Icon.png
    Dad's Ring
    Creates a ring of light around Isaac that petrifies enemies in contact.
  • Divorce Papers Icon.png
    Divorce Papers
    Spawns a Mysterious Paper, increases tears, and grants a bone heart.
  • Jaw Bone Icon.png
    Jaw Bone
    Spawns a familiar that flies the room while firing, dealing a flat 7 damage to enemies that come in contact and retrieving pickups.
  • Brittle Bones Icon.png
    Brittle Bones
    Replaces all red hearts with 6 empty bone hearts. Upon losing a bone heart, Isaac fires bones in 8 directions and permanently gains a tears up.
  • Broken Shovel 1 Icon.png
    Broken Shovel
    While held, causes multiple Mom's Foots to come down and stomp on Isaac. One of two parts necessary to create Mom's Shovel.
  • Broken Shovel 2 Icon.png
    Broken Shovel
    One of two parts necessary to create Mom's Shovel.
  • Mom's Shovel Icon.png
    Mom's Shovel
    Spawns a trapdoor that leads to the next floor upon activation. Unlocks The Forgotten when used on a mound of dirt that appears in The Dark Room.
  • Rotten PennyRotten PennySpawns a blue fly every time a coin is picked up.
  • Baby-BenderBaby-BenderGrants Isaac's familiars homing shots.
  • Finger BoneFinger BoneGrants a chance to gain a bone heart upon taking damage.
  • The Forgotten App.png
  • Crispy.png
  • Cross Stoney.png
  • Dank Charger.png
  • Leper.png
  • Mr. Mine.png
  • Mr. Red Maw.png
  • Boss The Matriarch.png
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