Monstro's Lung

Item Icon
Pickup Quote	"Charged burst attack"
Entity ID	5.100.229
Character Appearance
Tear Appearance
Item Pool	Treasure Room Treasure Room
Quality	2
Item Tags
Collection Grid	(page 3, column 6, row 3) (page 2, column 6, row 6)

Monstro's Lung is a passive item.

Effects

• Grants a charged shot that fires 14 tears in the same fashion as Monstro.
  • The attack can be released only when fully charged.
  • Each tear deals 100% Isaac's Damage.
  • Each tear has a random size multiplier between 0.9x to 1.33x, but there is no effect on damage.
• Tears down: Tear Delay × 4.3 / Fire Rate ÷ 4.3 (roughly 0.23x).

Notes

• Charge time can be found with the following equation:

$\text{(time)}=\frac{1}{30}(Roundup(\text{Tear Delay)})\approx \frac{1}{\text{Fire Rate}}$

• Each tear has independant chance to have Tear Effects.
• Tear falling speed ups will slightly reduce the effective range of Monstro's Lung.
  • Since range ups always add to tear falling speed, every range up reduces effective range.
• Multi-shot effects such as 20/20 or Keeper adds 2.4 tears to the barrage per tear they normally grant. The resulting amount is rounded, and is capped at 50.

Synergies

• 20/20 / The Inner Eye / Mutant Spider:
  • Adds 2, 5 or 7 tears to the barrage respectively. For the latter two, greatly slows down the charge.
  • Adds 2.4 extra tears to the barrage per extra tear added by the item, rounded down to the nearest whole number.
• Almond Milk / Soy Milk: Fires automatically upon reaching full charge.
• Anti-Gravity: Hover effect is overidden, but tear delay down still applies, which greatly reduces the charge time.
• Blood Clot: All tears are larger, with increased damage (as opposed to every 2nd tear like Blood Clot alone).
  • Tears have a 50% chance to be Blood Clot tears.
• Brimstone: Brimstone has priority. Does not apply Monstro's Lung's tears down. Fires 3-5 additional beams in random directions around Isaac. This effect also applies to Azazel and Tainted Azazel's versions of Brimstone.
  • Brimstone + Eye Sore: Overrides this synergy with a chance to shoot 1-3 additional beams in random directions.
• Chocolate Milk: Reduces Isaac's tear delay by 20%, and each tear from Monstro's Lung is a charged Chocolate Milk shot, massively increasing fire rate and damage.
  • This does not apply to Lilith's Incubus; picking up Chocolate Milk will significantly reduce damage and increase charge time.
  • The tear damage and the barrage size scale with charge amount. At 50% charge, the tear damage is 100%, the barrage size reaches 100% and is capped there. At 100% charge, the tear damage is 200%.
    • $\text{Charge Time (s)}=\frac{1}{30}(Roundup(\text{Tear Delay}\times \frac{5}{2}+1))\approx \frac{5}{2\times \text{Fire Rate}}$
      • This makes damage per second drop to 80%.
• Dr. Fetus: Monstro's Lung has priority. Does not apply Dr. Fetus' tears down. Fires 6 bombs which detonate simultaneously.
  • Monstro's Lung has priority. Does not apply Dr. Fetus' tears down. Fires 6 mini-bombs which detonate at different times. Multi-shot effects add 1 bomb to the barrage, up to 21 bombs.
• Epic Fetus: Epic Fetus has priority. Does not apply Monstro's Lung's tears down. 2-4 extra cursors rotate around the main cursor before the missiles land.
• Eye Sore: Adds a chance to fire 1-3 additional barrages in random directions.
• The Forgotten: The bone throw is replaced with a spray of bones. No effect on the melee swing and does not affect fire rate. The Soul behaves normally, including the tears down.
• Flat Stone: All tears bounce simultaneously; the effective range is greatly increased.
• Haemolacria: Monstro's Lung has priority. Applies +43 Tear Delay after Haemolacria tears down, instead of Monstro's Lung tears down. The barrage size is reduced to 4/7 (roughly 0.57), tears of which all burst.
  • The barrage size is 8 without any multi-shot effect. The resulting amount is rounded, and is capped at 29.
• Immaculate Heart: Fires a large number of extra tears alongside the burst that begin orbiting Isaac once they reach the orbit range.
• Ipecac: Fires Ipecac tears, with no increase in charge time.
  • Applies Ipecac's tears down.
• Technology: Does not apply Monstro's Lung's tears down. Grants a charged shot, fires 12 lasers in 30° spead that arc 3-4 times. A laser can hit an enemy multiple times between their arcings.
  • $\text{Charge Time (s)}=\frac{1}{30}(Roundup(\frac{43}{10}(\text{Tear Delay}+1)))\approx \frac{43}{10\times \text{Fire Rate}}$
    • This is equivalent of applying Monstro's Lung's tears down and its charge time, without actually altering tear delay.
  • Multi-shot effects add 12 lasers to the barrage, up to 128 lasers total.
  • Technology + Mysterious Liquid: The lasers leave creep each time they arc, resulting in a massive amount of creep.
  • Technology + Proptosis: The 6x damage is recovered each time they arc, nearly nullifying the distance penalty.
• Tech X: Fires 3-5 extra rings in 30° spead. Extra rings deal from 50% to 100% damage of the main ring.
  • Additional copy of Monstro's Lung adds 3-5 more rings.
  • Increases Tear Delay.
  • Fire Rate is divided by 3.1.
• The Ludovico Technique: The Ludovico Technique has priority. Does not apply Monstro's Lung's tears down. A cluster of variably sized tears orbit the main tear.
• Mom's Knife: Mom's Knife has priority. Does not apply Monstro's Lung's tears down. Fires additional knives depending on charge amount, each dealing 2x tear damage. Fires 3-5 knives at maximum charge.
• Mom's Wig: Charging an attack spawns spiders in rapid succession.
  • Spawns spiders upon firing, not charging. The amount of spiders spawned is dependent on luck.
• Monstro's Lung: Additional copies of this item, such as from Diplopia / Crooked Penny, add 10/ 12 tears to the barrage.
  • This effects is equivalent of adding 4/ 5 multi-shot effects. The items which have priority over Monstro's Lung or override it (e.g. Brimstone/C Section) benefit from this multi-shot effect.
• My Reflection: Tears stay in the air much longer and consistently, allowing better reach and more focused blasts before the tears returning to Isaac.
• Technology Zero: Replaces tears with white technology beams that slowly branch out like lightning.
• Tractor Beam: All the tears follow the beam at different heights without spreading out, making it much easier for multiple tears to hit a target.

Interactions

• Chemical Peel: Overridden by Monstro's Lung.
  • Tears have a 50% chance to be Chemical Peel tears.
• C Section: Overrides Monstro's Lung.
• Cursed Eye: Overridden by Monstro's Lung.
• Epic Fetus: Overrides Monstro's Lung.
• Epiphora: Tears stat is increased properly but firing cancels the effect.
• The Forgotten: Melee swing is unaffected, but the throw attack is replaced by the burst attack with small bones instead of tears.
• Isaac's Tears / Sad Bombs / Tammy's Head: Fires 8 normal tears.
• Kidney Stone: If Monstro's Lung is picked up while Kidney Stone is ready to fire, charge time for Monstro's Lung will be significantly decreased.
  • Only stat effects from Kidney Stone apply.
• Lachryphagy: The tears merge into one giant tears a while after being fired, and instantly burst. Without Piercing, most of the damage is often wasted. Without Spectral, the tears often collide against obstacles due to their size.
• Loki's Horns / Mom's Eye: Adds a chance to fire single tears in the other direction(s).
  • Adds a chance to fire barrages in the other direction(s).
• The Ludovico Technique: Overrides Monstro's Lung.
• Marked: Only stat effects from Marked apply.
  • Works as expected. Fires automatically upon reaching full charge.
• Neptunus: Overridden by Monstro's Lung.
• Pop!: The tears still fall after being fired.
• Spirit Sword: Overrides Monstro's Lung.
• Strange Attractor: Due to the high concentration of tears enemies will be pulled into Isaac at great force, in certain cases enough force to pull enemies through rocks.
• Tech.5: Occasionally fires a linear laser while charging.
• Technology: If picked up after Technology, Monstro's Lung has no effect. Technology will override Monstro's Lung with a very low firerate.
  • Technology has priority. Does not apply Monstro's Lung's tears down. Fires extra lasers in random directions.
• Technology 2: Fires a linear laser while charging.
• Ipecac + Dr. Fetus: Removes explosion immunity.
• The Wiz: 7-8 tears are fired at each diagonal direction instead of a full burst.
  • Adds a multi-shot effect (see Notes section). Full-sized barrage on each diagonal direction.

Trivia

• Prior to Repentance, this item's description was "Charged attack".

In-game Footage

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Gallery

• 

  Rebirth item concepts, including Monstro's Lung.

Bugs

Bug!	If The Forgotten obtains multiple copies of Monstro's Lung, he will swing 5 additional bone clubs in his melee attack per copy, up to a limit of 16.

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