Note 1 : Spell-like abilities such as the Death Knight and Mummy's Curse, Archangel's Resurrection, Unicorn's Blind, and Thunderbird's Lightning Strike operate identically to the equivalent spells for immunity purposes.

Note 2 : No creatures have immunity to the following special abilities: Behemoth's Defense Reduction, Dendroid's Binding, Dread Knight's Death Blow, Magog's Fireball, Rust Dragon's Acid Breath (defense reduction), Serpent Fly's Dispel.

Immunity Groupings

Mind Spells: Blind, Berserk, Frenzy, Hypnotize, Forgetfulness, Mirth, Sorrow
Fire Spells: Bloodlust, Curse, Magic Arrow, Blind, Fire Wall, Fireball, Land Mine, Misfortune, Armageddon, Berserk, Inferno, Protection from Fire, Fire Shield, Frenzy, Slayer, Sacrifice

Immunites by Creature Type

Undead : Mind Spells, Curse, Bless, Resurrection, Azure Dragon's Fear, Ghost Dragon's Aging, Zombie's Disease, Mighty Gorgon's Death Stare, Vampire Lord's Life Drain, Wyvern Monarch's Poison, Power Lich's Death Cloud (splash), Pit Lord's Demon Summoning Resurrection
Troglodytes/Infernal Troglodytes: Blind
Red Dragons: Immune to level 1-3 spells (except Force Field and Dispel), Dragon Fly's Weakness, Zombie's Disease, Medusa and Basilisk Petrification, Wyvern Monarch's Poison
Black Dragons: Immune to ALL spells (except Force Field), Dragon Fly's Weakness, Scorpicore's Paralysis, Medusa and Basilisk Petrification, Wyvern Monarch's Poison, Zombie's Disease, Ghost Dragon's Aging
Efreet/Efreet Sultans: Fire Spells, Efreet Sultan's Fire Shield
Golems: Mind Spells, Resurrection, Azure Dragon's Fear, Ghost Dragon's Aging, Mighty Gorgon's Death Stare, Vampire Lord's Life Drain, Wyvern Monarch's Poison, Zombie's Disease, Power Lich's Death Cloud (splash), Pit Lord's Demon Summoning Resurrection
Stone Golems: 50% damage reduction from damage spells
Iron Golems: 75% damage reduction from damage spells
Gold Golems: 85% damage reduction from damage spells
Diamond Golems: 95% damage reduction from damage spells
Stone/Obsidian Gargoyles: Resurrection, Ghost Dragon's Aging, Mighty Gorgon's Death Stare, Vampire Lord's Life Drain, Zombie's Disease, Power Lich's Death Cloud (splash), Pit Lord's Demon Summoning Resurrection
Giants/Titans: Mind Spells
Dwarves: 20% magic resistance, Dragon Fly's Weakness (20% chance of resisting)
Battle Dwarves: 40% magic resistance, Dragon Fly's Weakness (40% chance of resisting)
Green Dragons: Immune to level 1-3 spells (except Force Field and Dispel), Dragon Fly's Weakness, Zombie's Disease, Medusa and Basilisk Petrification, Wyvern Monarch's Poison
Gold Dragons: Immune to level 1-4 spells (except Force Field and Dispel), Dragon Fly's Weakness, Scorpicore's Paralysis, Medusa and Basilisk Petrification, Wyvern Monarch's Poison, Zombie's Disease, cannot be resurrected with Sacrifice
Elementals: Mind Spells, Azure Dragon's Fear, Ghost Dragon's Aging, Mighty Gorgon's Death Stare, Vampire Lord's Life Drain, Wyvern Monarch's Poison, Zombie's Disease, Power Lich's Death Cloud (splash), Pit Lord's Demon Summoning Resurrection
Air/Storm Elementals: Meteor Shower
Earth/Magma Elementals: Lightning and Chain Lightning, Armageddon
Fire/Energy Elementals: Fire Spells, Efreet Sultan's Fire Shield
Water/Ice Elementals: Ice Bolt, Frost Ring
Magic Elementals: Immune to ALL spells (except Force Field), Dragon Fly's Weakness, Medusa and Basilisk Petrification, Scorpicore's Paralysis
Firebirds/Phoenixes: Fire Spells, Efreet Sultan's Fire Shield
Faerie Dragons : Permanent Magic Mirror spell
Crystal Dragons: 20% magic resistance, Dragon Fly's Weakness (20% chance of resisting)
Azure Dragons: Immune to level 1-3 spells (except Force Field and Dispel), Azure Dragon's Fear, Dragon Fly's Weakness, Medusa and Basilisk Petrification, Wyvern Monarch's Poison, Zombie's Disease

Immunites by Spell

Level 1-3 Spells: Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Magic Elementals
Level 4 Spells: Gold Dragons, Black Dragons, Magic Elementals
Level 5 Spells: Black Dragons, Magic Elementals
Mind Spells: Giants/Titans, Undead, Golems, Elementals, Black Dragons, Magic Elementals
Fire Spells: Efreet/Efreet Sultans, Fire/Energy Elementals, Firebirds/Phoenixes, Black Dragons, Magic Elementals
Armageddon: Efreet/Efreet Sultans, Earth/Magma Elementals, Firebirds/Phoenix, Fire/Energy Elementals, Magic Elementals, Black Dragons, Gold Dragons
Berserk: Giants/Titans, Golems, Elementals, Efreet/Efreet Sultans, Firebirds/Phoenix, Undead, Black and Gold Dragons
Blind: Troglodytes/Infernal Troglodytes, Giants/Titans, Golems, Elementals, Undead, Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Efreet/Efreet Sultans, Firebirds/Phoenix
Chain Lightning: Earth/Magma Elementals, Magic Elementals, Black and Gold Dragons
Curse: Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Efreet/Efreet Sultans, Fire/Energy Elementals, Firebirds/Phoenix, Magic Elementals, Undead
Fire Shield: Efreet/Efreet Sultans, Firebirds/Phoenix, Fire/Energy Elementals, Magic Elementals, Black Dragons, Gold Dragons
Fireball: Fire/Energy Elementals, Efreet/Efreet Sultans, Firebirds/Phoenixes, Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Magic Elementals
Forgetfulness: Titans, Storm Elementals, Ice Elementals, Liches/Power Liches
Frost Ring: Water/Ice Elementals, Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Magic Elementals
Hypnotize: Giants/Titans, Golems, Elementals, Undead, Green/Gold Dragons Red/Black Dragons, Azure Dragons
Ice Bolt: Water/Ice Elementals, Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Magic Elementals
Implosion: Black Dragons, Magic Elementals
Inferno: Efreet/Efreet Sultans, Firebirds/Phoenix, Fire/Energy Elementals, Magic Elementals, Black Dragons, Gold Dragons
Lightning: Earth/Magma Elementals, Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Magic Elementals
Magic Arrow: Efreet/Efreet Sultans, Firebirds/Phoenix, Fire/Energy Elementals, Magic Elementals, Green/Gold Dragons, Red/Black Dragons, Azure Dragons
Meteor Shower: Air/Storm Elementals, Gold Dragons, Black Dragons, Magic Elementals
Resurrection: Gargoyles/Obsidian Gargoyles, Golems, Elementals, Undead, Black and Gold Dragons
Sorrow: Giants/Titans, Golems, Elementals, Undead, Green/Gold Dragons Red/Black Dragons, Azure Dragons

Immunities by Creature Special Ability

Azure Dragon's Fear: Azure Dragons, Undead, Golems, Elementals
Dragon Fly's Weakness: Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Magic Elementals, Crystal Dragons (20% chance only), Dwarves (20% chance only), Battle Dwarves (40% chance only)
Efreet Sultan's Fire Shield: Efreet/Efreet Sultans, Fire/Energy Elementals, Firebirds/Phoenix
Ghost Dragon's Aging: Undead, Golems, Elementals, Black Dragons, Stone/Obsidian Gargoyles
Medusa and Basilisk Petrification: Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Magic Elementals
Mighty Gorgon's Death Stare: Undead, Golems, Elementals, Stone/Obsidian Gargoyles
Pit Lord's Demon Summoning Resurrection: Undead, Golems, Elementals, Stone/Obsidian Gargoyles
Power Lich's Death Cloud (adjacent splash damage): Undead, Golems, Elementals, Stone/Obsidian Gargoyles
Scorpicore's Paralysis: Gold Dragons, Black Dragons, Magic Elementals
Vampire Lord's Life Drain: Undead, Golems, Elementals, Stone/Obsidian Gargoyles
Wyvern Monarch's Poison: Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Elementals, Golems, Stone/Obsidian Gargoyles, Undead
Zombie's Disease: Undead, Green/Gold Dragons, Red/Black Dragons, Azure Dragons, Golems, Elementals, Stone/Obsidian Gargoyles