Game logic
Status effects
What each status a spell can cause does, how long it lasts and which spells cause it.
How they work
- A spell’s status lands with its chance, which rises with the drawing quality and Isaac’s level in the element. Its strength (damage per tick, for example) comes from the spell.
- Burns, freezes, sleep, poison and the like do not stack: casting one again restarts its time. Stat changes, auras and curses do stack, and they multiply.
- Stats never go below 0. Attack, defense, speed, magic and the time between attacks stay at most at twice the unit’s own; magic defense at most 99; accuracy and evasion at most 150 over the unit’s own.
- Water damage puts out a burn, fire damage ends a freeze, any damage wakes a sleeping unit, and the second hit pops a bubble.
- Isaac and the bosses are immune to berserk, charm, terror and forget.
Damage and healing over time
Regeneration
#1- Heals the spell’s strength every 1 s, the first at once.
Lasts: 30 s · 1800 ticks
Caused by: God Song
Elemental aura · Fire
#9- Fire magic damage equal to the spell’s strength at once and again after 0.5 s.
Lasts: 0.6 s · 36 ticks
Caused by: Fire Armor
Elemental aura · Water
#10- Water magic damage equal to the spell’s strength at once and again after 0.5 s.
Lasts: 0.6 s · 36 ticks
Caused by: Ice Armor
Elemental aura · Earth
#11- Earth magic damage equal to the spell’s strength at once and again after 0.5 s.
Lasts: 0.6 s · 36 ticks
Caused by: Earth Armor
Elemental aura · Wind
#12- Wind magic damage equal to the spell’s strength at once and again after 0.5 s.
Lasts: 0.6 s · 36 ticks
Caused by: Wind Armor
Elemental aura · Light
#13- Light magic damage equal to the spell’s strength at once and again after 0.5 s.
Lasts: 0.6 s · 36 ticks
Caused by: Shiny Armor
Elemental aura · Dark
#14- Dark magic damage equal to the spell’s strength at once and again after 0.5 s.
Lasts: 0.6 s · 36 ticks
Caused by: Dark Armor
Wall contact · Fire
#16- Fire damage equal to the wall’s strength on contact, at most once every 2 s per post.
Lasts: Once
Caused by: Red Wall, Fire Wall, Blaze Wall
Wall contact · Water
#19- Water damage equal to the wall’s strength on contact, at most once every 2 s per post.
Lasts: Once
Caused by: Cool Wall, Ice Wall, Winter Wall
Wall contact · Water
#20- Water damage equal to the wall’s strength on contact, at most once every 2 s per post.
Lasts: Once
Caused by: Freeze Wall
Wall contact · Earth
#22- Earth damage equal to the wall’s strength on contact, at most once every 2 s per post.
Lasts: Once
Caused by: Anger Wall, Rage Wall, Fury Wall
Wall contact · Wind
#25- Wind damage equal to the wall’s strength on contact, at most once every 2 s per post.
Lasts: Once
Caused by: Wind Wall, Gale Wall, Storm Wall
Wall contact
#28- Heals the wall’s strength on contact, at most once every 2 s per post.
Lasts: Once
Caused by: White Wall, Gold Wall, Shine Wall
Wall contact · Dark
#31- Dark damage equal to the wall’s strength on contact, at most once every 2 s per post.
Lasts: Once
Caused by: Black Wall, Dark Wall, Pitch Wall
Burn
#88- Fire damage equal to the spell’s strength every 1 s, the first after 1 s. It does not work in fords. It removes freeze and bubble.
Lasts: 20 s · 1200 ticks
Caused by: Fireball, Fire Lance, Homing Fire, Blazer, Rapid Fire, Wide Fire, Maxi Fire, Red Cloud and 1 more
Strong burn
#89- Fire damage equal to the spell’s strength every 1 s. It replaces a normal burn and removes freeze and bubble.
Lasts: 20 s · 1200 ticks
Caused by: Burn Up, Roast Up, Crisp Up, Blaze Cloud, Fire King, Free Lift
Poison
#94- Dark damage equal to the spell’s strength every 1 s, but only while the unit moves or attacks.
Lasts: 20 s · 1200 ticks
Caused by: Poison, Poison Smog
Vile poison
#95- Dark damage equal to the spell’s strength every 1 s.
Lasts: 20 s · 1200 ticks
Caused by: Vile Poison, Vile Smog
Control
Freeze
#90- It cannot attack or move. Fire damage ends it.
Lasts: 3 s · 180 ticks
Caused by: Ice Shot, Freeze, Ice Lance, Homing Ice, Freezer, Rapid Ice, Wide Ice, Maxi Ice and 4 more
Long freeze
#92- It cannot attack or move. Fire damage ends it.
Lasts: 6 s · 360 ticks
Caused by: Ice King, Frozen Time
Bubble
#93- It cannot attack or move until it is hit twice.
Lasts: 10 s · 600 ticks
Caused by: Bubble, Bubble Up, Bubbles!!, Water Lord
Hidden
#96- It fades out over about 2 s.
Lasts: 15 s · 900 ticks
Caused by: Fairy Trick
Hidden
#97- It fades out over about 2 s.
Lasts: 10 s · 600 ticks
Caused by: Hidden Veil
Sleep
#98- It cannot attack or move. Any damage wakes it.
Lasts: 8 s · 480 ticks
Caused by: Sleep Call, Sleep Chant, Gold Song
Deep sleep
#99- It cannot attack or move. Any damage wakes it.
Lasts: 15 s · 900 ticks
Caused by: Sleep Song
Charm
#102- It drops its orders and fights its own side. It cancels berserk.
Lasts: 14 s · 840 ticks
Caused by: Sleep Wind, Sleep Gale, Sleep Storm
Invincible
#104- It takes no damage, cannot attack or move, and cannot be pushed.
Lasts: 10 s · 600 ticks
Caused by: Barrier, Invincible
Recoil
#105- Each hit it lands costs it a quarter of the damage it deals.
Lasts: 20 s · 1200 ticks
Caused by: Rebound
Recoil
#106- Each hit it lands costs it half of the damage it deals.
Lasts: 20 s · 1200 ticks
Caused by: Reprisal
Recoil
#107- Each hit it lands costs it all of the damage it deals.
Lasts: 20 s · 1200 ticks
Caused by: Revenge
Peace
#108- It cannot attack.
Lasts: 15 s · 900 ticks
Caused by: Peace Call, Peace Chant, Peace Song
Terror
#128- It runs away from the unit that threatens it.
Lasts: 20 s · 1200 ticks
Caused by: Terror, Pure Terror
Forget
#129- It stands still, doing nothing.
Lasts: 3 s · 180 ticks
Berserk
#130- Attack +100 %
- Attacks its target and ignores orders. It cancels charm.
Lasts: 20 s · 1200 ticks
Caused by: Mad Warrior, The Berserk, Last Rage, Big Brawl
One of several
#137Lasts: Once
Caused by: Betrayal
One of several
#138Lasts: Once
One of several
#139- 100 %: Stats
Lasts: 0.5 s · 30 ticks
Caused by: Wind Zone, Swift Zone, Gale Zone
One of several
#140- 100 %: Freeze
Lasts: Once
Caused by: Ice Maiden, Ice Queen, Ice Goddess
Stats
Stats
#40- Attack +50 %
Lasts: 18 s · 1080 ticks
Stats
#41- Defense +50 %
Lasts: 18 s · 1080 ticks
Caused by: Tough Armor, Defense Up, Defense On
Stats
#42- Magic defense +50 % of what it lacks to reach 100
Lasts: 18 s · 1080 ticks
Caused by: Light Armor, Magic Up, Magic On
Stats
#43- Speed +50 %
Lasts: 18 s · 1080 ticks
Stats
#44- Time between attacks −85 %
Lasts: 18 s · 1080 ticks
Caused by: Speed Over
Stats
#45- Evasion +40
Lasts: 18 s · 1080 ticks
Stats
#46- Accuracy +40
Lasts: 18 s · 1080 ticks
Stats
#48- Defense +80 %
Lasts: 24 s · 1440 ticks
Caused by: Defense Over
Stats
#49- Evasion +79
Lasts: 18 s · 1080 ticks
Caused by: Evade Over
Stats
#50- Accuracy +79
Lasts: 18 s · 1080 ticks
Caused by: Eye Over
Stats
#51- Attack −50 %
Lasts: 18 s · 1080 ticks
Caused by: Dark Lance, Homing Dark, Dark Crush, Power Down, Power Off
Stats
#52- Defense −60 %
Lasts: 18 s · 1080 ticks
Caused by: Defense Down, Defense Off
Stats
#53- Magic defense −40 % of what it lacks to reach 100
Lasts: 18 s · 1080 ticks
Caused by: Magic Down, Magic Off
Stats
#54- Speed −40 %
Lasts: 18 s · 1080 ticks
Caused by: Speed Down, Speed Off
Stats
#56- Evasion −40
Lasts: 18 s · 1080 ticks
Caused by: Rapid Dark, Wide Dark, Maxi Dark, Evade Down, Evade Off
Stats
#57- Accuracy −40
Lasts: 18 s · 1080 ticks
Caused by: Dust Cloud, Sand Cloud, Sand Storm, Accuracy Down, Accuracy Off
Stats
#59- Attack −70 %
Lasts: 18 s · 1080 ticks
Caused by: Power Under
Stats
#60- Defense −90 %
Lasts: 18 s · 1080 ticks
Caused by: Defense Under
Stats
#61- Magic defense −60 % of what it lacks to reach 100
Lasts: 18 s · 1080 ticks
Caused by: Magic Under
Stats
#62- Speed −65 %
Lasts: 18 s · 1080 ticks
Caused by: Speed Under
Stats
#64- Evasion −79
Lasts: 18 s · 1080 ticks
Caused by: Evasion Down
Stats
#65- Accuracy −79
Lasts: 18 s · 1080 ticks
Caused by: Accuracy Under
Stats
#66- Speed −100 %
Lasts: 0.5 s · 30 ticks
Caused by: Swamp Fog, Swamp Abyss
Stats
#79- Attack +80 %
- Speed +80 %
- Defense +80 %
- Magic +80 %
- Magic defense +80 % of what it lacks to reach 100
- Time between attacks −80 %
Lasts: 0.55 s · 33 ticks
Caused by: High Bless
Stats
#80- Attack −60 %
- Speed −60 %
- Defense −60 %
- Magic −60 %
- Magic defense −60 % of what it lacks to reach 100
- Time between attacks +60 %
Lasts: 0.55 s · 33 ticks
Caused by: Evil Bless
Stats
#81- Defense −50 %
- Magic defense −50 % of what it lacks to reach 100
Lasts: 18 s · 1080 ticks
Caused by: Curse
Stats
#82- Attack −20 %
- Defense −20 %
- Accuracy −26
Lasts: 18 s · 1080 ticks
Caused by: Black Curse, Black Grudge
Stats
#83- Attack −40 %
- Defense −40 %
- Accuracy −51
Lasts: 18 s · 1080 ticks
Caused by: Black Bind
Stats
#84- Attack −50 %
- Defense −50 %
- Magic −50 %
- Magic defense −50 % of what it lacks to reach 100
- Time between attacks +40 %
Lasts: 18 s · 1080 ticks
Caused by: Dark King
Virus
#85- Attack −20 %
- Defense −20 %
- Units touching a first victim (within 4 px) catch it for the time left.
Lasts: 18 s · 1080 ticks
Stats
#86- Accuracy −38
- Evasion −38
Lasts: 18 s · 1080 ticks
Caused by: Death Rain
Stats
#87- Defense +80 %
- Magic defense +100 % of what it lacks to reach 100
Lasts: 25 s · 1500 ticks
Caused by: Magic Over
Stats
#131- Attack +60 %
Lasts: 0.5 s · 30 ticks
Caused by: Power Zone
Stats
#132- Defense +60 %
Lasts: 0.5 s · 30 ticks
Caused by: Defense Zone
Stats
#133- Time between attacks −85 %
Lasts: 0.5 s · 30 ticks
Caused by: Speed Zone
Stats
#134- Evasion +40
Lasts: 0.5 s · 30 ticks
Caused by: Evade Zone
Stats
#135- Accuracy +40
Lasts: 0.5 s · 30 ticks
Caused by: Prime Zone
Stats
#136- Speed +100 %
Lasts: 0.5 s · 30 ticks
Elements
Weakness · Fire
#67- It takes twice the fire magic damage. A shield of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Fire Curse, Blaze Curse
Weakness · Water
#68- It takes twice the water magic damage. A shield of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Water Curse, Ice Grudge
Weakness · Earth
#69- It takes twice the earth magic damage. A shield of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Earth Curse, Rock Grudge
Weakness · Wind
#70- It takes twice the wind magic damage. A shield of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Wind Curse, Gale Grudge
Weakness · Light
#71- It takes twice the light magic damage. A shield of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Light Curse, Pure Grudge
Weakness · Dark
#72- It takes twice the dark magic damage. A shield of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Dark Curse, Dark Grudge
Shield · Fire
#73- It takes half the fire magic damage. A weakness of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Fire Aura, Blaze Aura
Shield · Water
#74- It takes half the water magic damage. A weakness of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Ice Aura, Freeze Aura
Shield · Earth
#75- It takes half the earth magic damage. A weakness of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Earth Aura, Rock Aura
Shield · Wind
#76- It takes half the wind magic damage. A weakness of the same element cancels it.
Lasts: 30 s · 1800 ticks
Shield · Light
#77- It takes half the light magic damage. A weakness of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Light Aura, Shine Aura
Shield · Dark
#78- It takes half the dark magic damage. A weakness of the same element cancels it.
Lasts: 30 s · 1800 ticks
Caused by: Dark Aura, Black Aura
Cures
Cure
#117- Removes every status and stat change.
Lasts: Once
Caused by: Purge Curse, White Cure
Cure
#118- Removes sleep.
Lasts: Once
Cure
#119- Removes stat changes, curses and auras.
Lasts: Once
Caused by: Purge Magic
Cure
#120- Removes poison.
Lasts: Once
Caused by: Antidote
Cure
#121- Removes virus.
Lasts: Once
Caused by: Cure Prayer, Heal Prayer
Cure
#122- Removes freeze.
Lasts: Once
Caused by: Fire Warmth, Fire Calm
Cure
#123- Removes burn.
Lasts: Once
Caused by: Kind Water, Shine Ice
Cure
#124- Removes berserk, charm.
Lasts: Once
Caused by: Heal Mind, Heal Heart
Cure
#125- Removes freeze.
- Attack +20 %
Lasts: 20 s · 1200 ticks
Caused by: Fire Soul
Cure
#126- Removes burn.
- Evasion +26
Lasts: 20 s · 1200 ticks
Caused by: Pure Soul
Cure
#127- Removes berserk, charm.
- Speed +20 %
Lasts: 20 s · 1200 ticks
Caused by: Heal Soul
Terrain
Terrain mark
#111- Turns the ground into magma
Lasts: 20 s · 1200 ticks
Caused by: Fire Rain, Rain Fire, Hail Fire, Hail Blaze, Earth Explode
Terrain mark
#112- Hardens magma
Lasts: 20 s · 1200 ticks
Caused by: Storm, Rain Frost, Hail Frost, Hail Ice
Terrain mark
#114- Turns quicksand into swamp
Lasts: 20 s · 1200 ticks
Caused by: Swamp
Terrain mark
#116- Restores the terrain
Lasts: 20 s · 1200 ticks
Caused by: Restore, Pure Wind, Light Shot, Divine Shot, Apocalypse, Dark Shot, Fallen Shot, Devil Shot and 3 more
37 more records are in the data, but no spell uses them.