Upon entering a room with enemies, spawns a Green Locust which damages and poisons enemies. Upon entering a room with enemies, spawns a Yellow Locust that damages and slows enemies. Upon entering a room with enemies, spawns a Black Locust that does a very high amount of damage. Upon entering a room with enemies, spawns 2-5 White Locusts which damage enemies. Harbingers have different behaviors and spawn themed Locusts. Spawns a random Harbinger familiar that changes every 10 seconds. White Locusts are identical to Blue Flies, but are generally spawned in high quantities. Black Locusts deal quadruple Isaac's damage instead of double. Red Locusts explode on contact with an enemy, dealing an extra 60 damage in the radius ( explosions are affected by certain bomb modifiers). They behave like regular Blue Flies but have additional special effects. Locusts are variants of Blue Flies that are spawned by Locust trinkets and 7 Seals.

Corny Poops created by Tainted ? or IBS spawn a blue fly every two seconds, up to a maximum of 3.

Rotten Heart: After clearing a room, a maximum of two Blue Flies spawn for each Rotten Heart in Isaac's life bar.

As Keeper or Tainted Keeper, all heart pickups turn into Blue Flies.

Friends Till The End! pill: Spawns three Blue Flies.

Beelzebub transformation: All enemy flies become Blue Flies.

Guppy transformation: Isaac will create Blue Flies whenever his tears or his familiars' tears hit enemies.

Dark blue champion: Will create 3 Blue Flies when defeated.

Red Chest: Has a chance to spawn 3 Blue Flies.

Consumes all pedestal items in the room and turns them into random stat upgrades. Consumes all pickups in the room and turns them into Blue Flies and Spiders. Summons 3 friendly Blue Flies and 3 friendly Blue Spiders.ĭeals 40 damage to all enemies in the room. Spawns a Blue Fly every time a coin is picked up. Items and trinkets that generate Blue Flies or locusts will generate twice as many. Spawns a Blue Fly from every pile of Poop that Isaac destroys. Spawns a Blue Fly every time Isaac takes damage. Each time a room is cleared, spawns another orbital fly. Spawns eight orbital flies, which turn into Blue Flies after they block a shot. Turns some Fly enemies into friendly Blue Flies if it touches them while deflecting shots. Spawns a fly orbital familiar that chases and deflects enemy shots and converts them into homing tears that deal 2 damage.

Every four pickups, it opens a portal that leads to an unexplored room.

Each one will increase its size and damage and spawn a Blue Fly. Tears have a 1/6 chance of spawning allied Blue Flies when they hit an enemy.Īdds a chance to fire an egg sack which creates slowing creep and spawns a Blue Fly or Blue Spider upon hitting an enemy.Ī familiar that flies forward, consuming pickups in its path. Spawns a familiar that spawns a Blue Fly when Isaac shoots.

If fully charged, instead has one of many unique effects.ġ-3 Blue Flies randomly spawn every time Isaac gets hit.Ģ-6 Blue Flies randomly spawn every time Isaac gets hit. Spawns certain pickups based on how many charges it has.

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