This page lists all the changes made to each spell, organized by by spell type (priest/wizard), then by level, and finally in alphabetical order. Each change notes which games are affected and includes a link back to the tweak that made that change. If you would prefer to see the spell changes organized by category, you can do so here.
Cause Light Wounds
The spell now does 5 hit points damage, plus 1 per level to a maximum of 5. (not Spell Revisions; source)
Cure Light Wounds
The spell now heals 5 hit points, plus 1 per level to a maximum of 5. (not Spell Revisions; source)
Entangle
Entangle does not affect very large creatures like giants or dragons (which brush the entwining plants aside), incorporeal creatures like shadows or wraiths (which pass through them), amorphous creatures like slimes or elementals (which flow around them), or creatures shrouded in magical fire (which burn them away in their vicinity). (source)
Magical Stone
Magical Stone does 3d4 damage (6d4 vs undead), rather than 1d4. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Cause Moderate Wounds
The spell now does 10 hit points damage, plus 1 per level to a maximum of 10. (not Spell Revisions; source)
Chant
The spell no longer prevents spellcasting (IWDEE; source)
Cure Moderate Wounds
The spell now heals 10 hit points, plus 1 per level to a maximum of 10. (not Spell Revisions; source)
Flame Blade
The spell now does +1d4 fire damage rather than +2 (IWDEE; source)
Slow Poison
The spell now genuinely slows the effect of poison (reducing the speed of its effect by 90%) instead of neutralising it altogether. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Call Lightning
The lightning bolts now strike somewhat more frequently (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Cause Medium Wounds
The spell now does 15 hit points damage, plus 1 per level to a maximum of 15. (not Spell Revisions; source)
Circle of Bones
The spell's duration is increased to 1 round per level and it no longer immobilizes the caster. (source)
Cure Medium Wounds
The spell now heals 15 hit points, plus 1 per level to a maximum of 15. (not Spell Revisions; source)
Holy Smite
The spell now does 1d4 damage per level, rather than 1d6 per two levels with a cap at 5d6. (IWDEE; source)
Protection From Fire
The spell now lasts for 1 turn per level rather than 3 rounds + 1 round per level. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Strength of One
Strength of One increases recipients' strength to 18/76 rather than 18/75. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Summon Insects
Insects act as summoned creatures: magic resistance or Dispel Magic do not affect them; they inflict piercing damage; they cannot affect creatures unaffected by nonmagical weapons; they will not attack undead; they cannot penetrate the extreme heat or cold of a Fire Shield. (not Spell Revisions; source)
Unholy Blight
The spell now does 1d4 damage per level, rather than 1d6 per two levels with a cap at 5d6. (IWDEE; source)
Cure Serious Wounds
The spell now heals 20 hit points, plus 1 per level to a maximum of 20. (not Spell Revisions; source)
Defensive Harmony
The spell increases AC by +4 instead of +2 (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Lesser Restoration
Temporarily lost ability score points are now restored. (source)
Thorn Spray
Damage is increased from 2d10 to 4d12, increasing to 5d12 at 9th level and a maximum of 6d12 at 11th level. (source)
Cure Critical Wounds
The spell now heals 25 hit points, plus 1 per level to a maximum of 20 (25 in Icewind Dale). (not Spell Revisions; source)
Divine Protection
The spell has been renamed from 'Shield of Lathander' and is now usable by clerics of all alignments; it is self-only and has a shortened casting time. (source)
Flame Strike
The spell does 1d8 damage per level, not a flat 8d6 (IWDEE; source)
The spell is targeted on a creature rather than a point (IWDEE; source)
Insect Plague
Insects act as summoned creatures: magic resistance or Dispel Magic do not affect them; they inflict piercing damage; they cannot affect creatures unaffected by nonmagical weapons; they will not attack undead; they cannot penetrate the extreme heat or cold of a Fire Shield. (not Spell Revisions; source)
Slay Living
The spell no longer requires a successful melee attack. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
True Seeing
Truesight removes the effect of Blindness. (not Spell Revisions; source)
Blade Barrier
The blades only affect hostile creatures. (not Spell Revisions; source)
A successful saving throw now reduces damage by half rather than negating it altogether. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Harm
The spell inflicts 150 hit points of damage, but leaves its target with at least 1 hit point. (not Spell Revisions; source)
Sol's Searing Orb
Sol's Searing Orb does 6d6 damage, not 3d6, and does not require a hit roll. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Creeping Doom
Insects act as summoned creatures: magic resistance or Dispel Magic do not affect them; they inflict piercing damage; they cannot affect creatures unaffected by nonmagical weapons; they will not attack undead; they cannot penetrate the extreme heat or cold of a Fire Shield. (not Spell Revisions; source)
Energy Drain
The spell drains 5 levels rather than 2. (not Spell Revisions; source)
Gate
The fiend summoned depends on the caster's alignment: Lawful casters summon a Pit Fiend, Chaotic and Neutral casters summon a Balor. (source)
Greater Divine Protection
The spell has been renamed from 'Greater Shield of Lathander' and is now usable by clerics of all alignments; it is self-only and has a shortened casting time. (source)
Greater Restoration
Restoration only affects one creature (this was the standard behavior anyway on Enhanced-Edition games). (BG1TUTU,BGT,SoA,ToB; source)
Temporarily lost ability score points are now restored. (source)
Healing Mist
This spell has been renamed from 'Mist of Eldath' to 'Healing Mist'. (source)
Impervious Sanctity of Mind
The spell also includes a Spell Shield effect (first anti-magic spell absorbed harmlessly) and grant immunity to spell failure (though spells can still be disrupted by damage). (source)
Nature's Beauty
Anti-illusion magic will not remove the blindness effect (or, on Spell Revisions installs, the Charm effect). (source)
Symbol, Death
The symbol only affects hostile creatures. (not Spell Revisions; source)
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Symbol, Fear
The symbol only affects hostile creatures. (not Spell Revisions; source)
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Symbol, Hopelessness
The symbol only affects hostile creatures. (not Spell Revisions; source)
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Symbol, Pain
The symbol only affects hostile creatures. (not Spell Revisions; source)
The spell no longer grants a saving throw. (source)
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Symbol, Stun
The symbol only affects hostile creatures. (not Spell Revisions; source)
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Chromatic Orb
The spell now works as in Icewind Dale: less drastic effects at higher levels, but no bonus to the saving throw. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Color Spray
The spell now affects any creature of the caster's level or below. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Larloch's Minor Drain
The spell drains 1d4 hit points at 1st level, increasing by 1d4 every 2 levels to a maximum of 5d4. (not Spell Revisions; source)
Shocking Grasp
The spell no longer requires a successful melee attack. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Power Word, Sleep
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Strength
The duration is increased to 1 hour per level. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Web
Web does not affect very large creatures like giants or dragons (which brush the webs aside), incorporeal creatures like shadows or wraiths (which pass through them), amorphous creatures like slimes or elementals (which flow around them), or creatures shrouded in magical fire (which burn them away in their vicinity). (source)
Ghost Armor
The spell gives an AC of 1 (rather than 2) and lasts for 1 hour rather than 1 round per level. (IWDEE; source)
Haste
Haste is cancelled by Slow. (BG2EE,BGEE,EET,IWDEE; not Spell Revisions; source)
Lightning Bolt
Any creature is only damaged once by each Lightning Bolt, no matter how often it rebounds into them. (BG2EE,BGEE,EET,IWDEE; not Spell Revisions; source)
Melf's Minute Meteors
Meteors count as +2 weapons (rather than +6). (not Spell Revisions; source)
Protection From Normal Missiles
The spell blocks most magical arrows, bolts etc that lack a formal "plus": that is, it blocks fire arrows, ice arrows and the like. The exceptions are the Arrows of Detonation, the Arrows of Slaying, and the Arrows of Dispelling. (not Spell Revisions; source)
Skull Trap
Damage is capped at 12d6. (not Spell Revisions; source)
Slow
Slow is cancelled by Haste. (BG2EE,BGEE,EET,IWDEE; not Spell Revisions; source)
Spell Thrust
This spell may be used to remove magical protections even from creatures which could not normally be targetted by spells because they are invisible. (source)
Ice Storm
The spell inflicts 2d8 cold damage per round for 4 rounds, rather than a one-off 3d10 damage (IWDEE; source)
Minor Sequencer
This spell's school has been changed to Conjuration/Evocation, so that all specialist mages can learn it. (not Spell Revisions; source)
Polymorph Self
Available forms are changed; full details here. (BG2EE,BGEE,EET,IWDEE; source)
Secret Word
This spell may be used to remove magical protections even from creatures which could not normally be targetted by spells because they are invisible. (source)
Spirit Armor
The spell lasts for 2 hours rather than 3 turns (IWDEE; source)
Breach
Breach affects creatures normally immune to fifth-level spells (like liches and rakshasas), and does not penetrate Spell Turning and the like. (source)
Conjure Lesser Air Elemental
The spell no longer requires a battle to control the elemental: it is automatically controlled by the caster. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; source)
Conjure Lesser Earth Elemental
The spell no longer requires a battle to control the elemental: it is automatically controlled by the caster. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; source)
Conjure Lesser Fire Elemental
The spell no longer requires a battle to control the elemental: it is automatically controlled by the caster. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; source)
Lower Resistance
Lower Resistance decreases resistance by 30% + 1%/level, not 10% + 1%/level (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Conjure Air Elemental
The spell no longer requires a battle to control the elemental: it is automatically controlled by the caster. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; source)
Conjure Earth Elemental
The spell no longer requires a battle to control the elemental: it is automatically controlled by the caster. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; source)
Conjure Fire Elemental
The spell no longer requires a battle to control the elemental: it is automatically controlled by the caster. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; source)
Contingency
This spell's school has been changed to Conjuration/Evocation, so that all specialist mages can learn it. (not Spell Revisions; source)
Death Fog
The spell no longer automatically kills summoned monsters. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Death Spell
The spell no longer automatically kills summoned monsters. (BG1TUTU,BG2EE,BGEE,BGT,EET,SoA,ToB; not Spell Revisions; source)
Improved Haste
Haste is cancelled by Slow. (BG2EE,BGEE,EET,IWDEE; not Spell Revisions; source)
Pierce Magic
This spell may be used to remove magical protections even from creatures which could not normally be targetted by spells because they are invisible. (source)
Power Word, Silence
The spell is moved to the Enchantment school. (not Spell Revisions; source)
True Sight
Truesight removes the effect of Blindness. (not Spell Revisions; source)
Acid Storm
The victim initially suffers 10d6 points of acid damage. After the initial damage, the victim must save vs. Spell to avoid more damage. If unsuccessful, the victim continues to suffer acid damage in the following rounds, sustaining two fewer dice of damage each round: that is, 8d6 damage with this spell on the first round, 6d6 on the second round, 4d6 on the third round, 2d6 on the fourth round, and the spell ends on the fifth round. Moving out of the area of effect does not stop the damage. (source)
Cacofiend
The fiend summoned depends on the caster's alignment: Lawful casters summon a Bone Fiend, Chaotic and Neutral casters summon a Nabassu. (source)
Khelben's Warding Whip
This spell may be used to remove magical protections even from creatures which could not normally be targetted by spells because they are invisible. (source)
Mantle
The spell protects against weapons of +3 or lesser enchantment. (not Spell Revisions; source)
Mordenkainen's Force Blade
The force blade is used as a Fighter of the caster's level (instead of half their level). (source)
Power Word, Stun
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Project Image
Clones cannot use innate abilities or quick-slot magic items. (not Spell Revisions; source)
Ruby Ray of Reversal
This spell may be used to remove magical protections even from creatures which could not normally be targetted by spells because they are invisible. (source)
Spell Sequencer
This spell's school has been changed to Conjuration/Evocation, so that all specialist mages can learn it. (not Spell Revisions; source)
Abi-Dalzim's Horrid Wilting
The spell no longer affects earth/air/fire elementals, undead, constructs, and the like. (not Spell Revisions; source)
Improved Mantle
The spell protects against weapons of +4 or lesser enchantment. (not Spell Revisions; source)
Iron Body
The physical damage protection increases to 75% and the spell now imposes a -2 casting time penalty rather than blocking spellcasting outright. (source)
Pierce Shield
This spell may be used to remove magical protections even from creatures which could not normally be targetted by spells because they are invisible. (source)
Power Word, Blind
The spell targets a single creature only. (not Spell Revisions; source)
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Simulacrum
Clones cannot use innate abilities or quick-slot magic items. (not Spell Revisions; source)
Spell Trigger
This spell's school has been changed to Conjuration/Evocation, so that all specialist mages can learn it. (not Spell Revisions; source)
Summon Fiend
The fiend summoned depends on the caster's alignment: Lawful casters summon a Cornugon, Chaotic and Neutral casters summon a Glabrezu. (source)
Symbol, Death
The symbol only affects hostile creatures. (not Spell Revisions; source)
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Symbol, Fear
The symbol only affects hostile creatures. (not Spell Revisions; source)
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Symbol, Stun
The symbol only affects hostile creatures. (not Spell Revisions; source)
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Absolute Immunity
The spell protects against weapons of +6 or lesser enchantment (i.e. essentially all weapons). (not Spell Revisions; source)
Chain Contingency
This spell's school has been changed to Conjuration/Evocation, so that all specialist mages can learn it. (not Spell Revisions; source)
Energy Drain
The spell drains 5 levels rather than 2. (not Spell Revisions; source)
Gate
The fiend summoned depends on the caster's alignment: Lawful casters summon a Pit Fiend, Chaotic and Neutral casters summon a Balor. (source)
Power Word, Kill
The spell is moved to the Enchantment school. (not Spell Revisions; source)
Shapechange
Available forms are changed; full details here. (BG2EE,BGEE,EET,IWDEE; source)
Spellstrike
This spell may be used to remove magical protections even from creatures which could not normally be targetted by spells because they are invisible. (source)