Image you are the DM and you have a Cleric, Wizard, Druid, and Psion party turning level 15. They've been good little optimizers and haven't lost any caster levels.
And they haven't broken your campaign with their 7th level spells, but now that they are about to get 8th level ones, you figure you'd better look over the 8th and 9th level spells. After all, you like to stay ahead of the curve. If you need to ban anything, now is the time.
You feel reasonably confident that if you could handle 7th level spells, you can handle 8th level ones. But the more you look at 9th level ones, the more you're not sure you can handle
. Atleast, not any that your players would bother using. The Psion laughs at Dominate Monster being a 9th level spell, considering he's had it as basically a 5th level spell.
What 9th level spells would you think are balanced? A balanced spell is A) not too weak to ignore / never use but B) not so strong as to break your campaign. Shapechange, for example, you find just too much.
Absorption Complete Arcane, Spell Compendium, Tome and Blood
Abyssal Army Planar Handbook, Spell Compendium
Abyssal Frenzy, Mass Fiendish Codex 1
Abyssal Rift Fiendish Codex 1
Anathema Champions of Ruin
Annihilation Dragon #294 (pg 33)
Apocalypse from the Sky Book of Vile Darkness
Arboreal Transformation Complete Mage
Armageddon Book of Exalted Deeds
Astral Projection Player’s Handbook
Avalanche of Devastation WB94
Awaken Construct Savage Species, Spell Compendium
Awaken Magical Beast Dragon #304 (pg 38)
Bigby’s Crushing Hand Player’s Handbook
Binding Chain of Fate City of Splendor: Waterdeep, WB190
Black Blade of Disaster Magic of Faerûn, Spell Compendium
Blinding Glory Book of Exalted Deeds
Breath Weapon Admixture Draconomicon, Spell Compendium
Burst of Glacial Wrath Dragon Magic
Call Marut Planar Handbook, Spell Compendium
Call Undead IX Age of Mortals
Cast in Stone Magic of Faerûn, Spell Compendium
Channel Greater Celestial Book of Exalted Deeds
Citygate Dragon #317 (pg35)
Cloak of Bravery, Greater Complete Warrior, Spell Compendium
Cometstrike Frostburn
Conjure Ice Beast IX Frostburn
Consensus Tower of High Sorcery
Construct Essence, Greater Races of Eberron
Crushing Fist of Spite Book of Vile Darkness
Deadly Sunstroke Complete Mage
Despoil Book of Vile Darkness, Fiendish Codex 1
Detonate Player’s Handbook II
Diamond Body Age of Mortals
Dimension Jumper, Greater Complete Mage
Dominate Monster Player’s Handbook
Doom of the Seas Stormwrack
Dragon Ally, Greater Draconomicon, Spell Compendium
Dragonshape Player’s Handbook II
Drown, Mass Spell Compendium, Underdark
Effulgent Epuration Magic of Faerûn, Player’s Guide to Faerûn, Spell Compendium
Elemental Swarm Player’s Handbook
End to Strife Book of Exalted Deeds
Energy Drain Player’s Handbook
Enervating Breath Draconomicon, Spell Compendium
Ensul’s Soultheft City of Splendor: Waterdeep
Epidemic Masters of the Wild
Eternity of Torture Book of Vile Darkness
Exalted Fury Book of Exalted Deeds
Eye of Power Player’s Guide to Faerun, Spell Compendium
Fantastic Machine, Greater Forgotten Realms Campaign Setting, Spell Compendium
Feast of Champions Eberron Campaign Setting
Force Burn WB189
Freedom Player’s Handbook
Gate Player’s Handbook
Genesis Defenders of the Faith, Deities and Demigods, Epic Level Handbook
Genius Loci Complete Mage
Halaster’s Fetch VI City of Splendor: Waterdeep
Halaster’s Scrying Cage Expedition to Undermountain
Halaster’s Teleport Cage City of Splendor: Waterdeep, Expedition to Undermountain
Heavenly Host Planar Handbook, Spell Compendium
Hellish Horde Planar Handbook, Spell Compendium
Hero’s Blade Dragon #319 (pg52), Eberron Campaign Setting
Hide Life Tome and Blood
Huma’s Legacy Holy Orders of the Stars
Hunters of Hades Planar Handbook, Spell Compendium
Ice Assassin Frostburn, WB106
Iceberg Frostburn
Imbrue Dragon #336 (pg 81)
Implore Dragon #336 (pg 82)
Implosion Player’s Handbook
Imprisonment Player’s Handbook
Incarnate Construct Savage Species
Instant Refuge Forgotten Realms Campaign Setting, Spell Compendium
Internal Fire Complete Arcane, Oriental Adventures
Invoke Magic Lords of Madness
Invulnerability to Elements Masters of the Wild
Jade Aura Oriental Adventures
Khelben’s Dweomerdoom City of Splendor: Waterdeep
Kissed by the Ages Dragon #354 (pg 54)
Laeral’s Crowning Touch City of Splendor: Waterdeep
Lash of Force Complete Mage
Lookingglass Masters of the Wild
Magic Miasma Player’s Guide to Faerun, Spell Compendium
Magius’s Light of Truth Dragonlance Campaign Setting
Maw of Chaos Forgotten Realms Campaign Setting, Magic of Faerûn, Savage Species, Spell Compendium
Meteor Swarm Player’s Handbook
Mindrape Book of Vile Darkness
Mindspin, Greater Tower of High Sorcery
Miracle Player’s Handbook
Monstrous Thrall Complete Divine, Defenders of the Faith, Draconomicon, Spell Compendium
Moonfire Forgotten Realms Campaign Setting, Spell Compendium
Mordenkainen’s Disjunction Player’s Handbook
Mycontil’s Last Resort Shining South
Nature’s Avatar Complete Divine, Masters of the Wild, Spell Compendium
Necrotic Termination Libris Mortis
Node Genesis Champions of Ruin, Underdark
Obedient Avalanche Complete Divine, Frostburn, Magic of Faerûn, Player’s Guide to Faerûn, Spell Compendium
Open Greater Chakra Magic of Incarnum
Otyugh Swarm Complete Divine, Defenders of the Faith, Dragonlance Campaign Setting, Spell Compendium
Pavilion of Grandeur Complete Divine, Spell Compendium
Perniarch, Planar Planar Handbook, Spell Compendium
Phantom Bear Complete Divine, Spell Compendium
Plague of Undead Heroes of Horror, Libris Mortis, Spell Compendium
Planar Navigation Stormwrack
Planar Pocket Dragon #304 (pg 40)
Power Word, Kill Player’s Handbook
Precipitate Complete Breach Planar Handbook
Prismatic Deluge Complete Mage
Prismatic Sphere Player’s Handbook
Programmed Amnesia Complete Arcane, Spell Compendium
Putrefaction Dragon #300 (pg 56)
Quagmire Vortex WB97
Rain of Black Tulips Book of Exalted Deeds
Raise Volcano WB91
Reality Maelstrom Manual of the Planes, Spell Compendium
Reaving Dispel Complete Arcane, Spell Compendium
Replicate Casting Magic of Faerûn, Spell Compendium
Reverse Death Tower of High Sorcery
Revitalize Legacy, Greater Weapons of Legacy
Righteous Exile Fiendish Codex 2
Ring of Fire Exemplars of Evil (pg 28)
Sanctify the Wicked Book of Exalted Deeds
Shades Player’s Handbook
Shadow Landscape Complete Divine, Spell Compendium
Shapechange Player’s Handbook, Rules Compendium
Shifting Sanction Dragon #308 (pg 25)
Skyrift WB112
Soul Bind Player’s Handbook
Soulmeld Disjunction Magic of Incarnum
Spell Matrix, Greater Magic of Faerûn, Player’s Guide to Faerûn, Spell Compendium
Sphere of Ultimate Destruction Complete Arcane, Spell Compendium, Unapproachable East
Spiritual Horde Age of Mortals
Srinshee’s Spell Shift Lost Kingdoms of Faerun
Stalking Spell Dragon #291 (pg 46)
Stasis Clone Lords of Darkness (pg 187)
Storm of Vengeance Player’s Handbook
Sublime Revelry Book of Exalted Deeds
Summon Avatar of Elemental Evil Dragon #347 (pg 78)
Summon Desert Ally IX Sandstorm
Summon Devoted Roc Races of the Wild
Summon Elemental Monolith Complete Arcane, Dragon #347 (pg 57), Spell Compendium
Summon Golem Player’s Handbook II
Summon Monster IX Oriental Adventures, Player’s Handbook
Summon Nature’s Ally IX Player’s Handbook
Tainted Aura Oriental Adventures
Teleportation Circle Player’s Handbook
Temporal Sphere, Mobile Legends of the Twins
Thunderswarm Masters of the Wild
Tidal Wave Shining South
Time Reaver Legends of the Twins, Tower of High Sorcery
Time Stop Player’s Handbook
Towering Thunderhead Complete Mage
Transcend Mortality Complete Mage
Transmute Rock to Lava Complete Arcane, Dragon #292 (pg 50), Spell Compendium
Travel the Paths of the Mind Tower of High Sorcery
True Reincarnate Masters of the Wild
True Resurrection Player’s Handbook
True Seeing, Mass Races of Eberron
Truename Binding, Greater Tome of Magic
Tsunami Dragon #314 (pg 47), Spell Compendium
Unbinding Complete Divine, Defenders of the Faith, Dragonlance Campaign Setting, Spell Compendium
Undeath’s Eternal Foe Magic of Faerûn, Player’s Guide to Faerûn, Spell Compendium
Undermaster Spell Compendium, Underdark
Unname Tome of Magic
Vile Death Heroes of Horror, Savage Species, Spell Compendium
Visage of the Deity, Greater Book of Exalted Deeds, Complete Divine, Defenders of the Faith, Spell Compendium
Wail of the Banshee Player’s Handbook
Weighed in the Balance Spell Compendium, Underdark
Weird Player’s Handbook
Welcome the Amoebic Sea Dragon #330 (pg 32)
Were-Doom Book of Vile Darkness
Whirlwind, Greater Complete Divine, Spell Compendium
Wish Player’s Handbook
Word of Genesis Tome of Magic
Writhing Ruin Dragon #300 (pg 57)