Adding new spells can be great for spellcasters. 3E and 3.5E is pretty much caster heaven, there's a lot of source material.

Design Considerations

Some thoughts on new spells (and on rebalancing some existing spells):

Also note on martial classes - we should think about adding more abilities they can use.

Epic Spells will probably live on another page. They're technically feats anyway.

Spell Sources

Obvious sources are other videogames:

Beyond that there are several 3.0E sourcebooks to look into before looking into 3.5E spells specifically.

Requirements for Spells

Materials needed for a spell primarily is a spell icon (and scroll icon) and of course the spell script(s). VFX and AOE, which may include sounds, may also be required.

New Spells List

A rough list which is in no particular order.

Spell NameEffectsReasoningWork Required
Spell TriggerAllows a pre-cast spell or set of spells to be released instantly.Mages get some more prepared defensive or offensive power and I like BG2 mages
Spell ContingencyAllows a pre-set condition to be triggered for a contingency to apply. EG: Damaged by physical attacks, apply StoneskinMages get some more prepared defensive or offensive power and I like BG2 mages
DisintegrateHigh magical damage to a single target if a touch attack hitsPretty fun spell and Bioware made a beam for it. Can optionally also make a cool vfx to do the "disintegrate"
Baleful PolymorphMakes the target into something like a Chicken

Moderately high level, can script to not apply vs plot/immortal characters, shapeshifters etc.

Not really much, a new polymorph line and some coding around it (so AI can't "cancel it"). Note is quite powerful so may make 1 round/level, or reverts on X damage (maybe link to temporary HP/EffectRunScript) so it's more a disabling spell.

Make sure it doesn't affect Immortal creatures.

Iron BodyPolymorph into Iron Golem, or apply a load of bonusesJust a great defensive spell.Might not add but might see how it goes. Can do a lot of the effects (and catch potion uses I guess) to allow 50% spell failure (can't just do arcane spell failure - unless creature hide).
Spell ImmunityCleric spell to provide immunity to very specific enemy spellsCleric power! Might be a bit cheesy though.
Read MagicIdentifies an unidentified scrollNice little cantrip / low level spell for identificationNot much, new VFX might be nice.
Shield OtherTarget gets +1 defelection AC and +1 to saves, and caster takes 50% of the damage they takeWould be fun to have OnDamaged used and do something semi useful

Can't account for being damaged to death, so need to note that.

Would apply EffectHeal and EffectDamage on the various people involved. Easy enough except if the damage is high enough to kill a person outright.

Summon Natures Ally I - XISummoning creatures for Druids

This allows spontaneous casting of Summoning spells for Druids.

If added will need to have the base healing spells duplicated for Druids so they are not spontaneously castable by them. Bit of a faff annoyingly. This is unless the engine has support to limit what spells are spontaneously castable per class.

Lionheart