Any D20 games in which magic has bad side effects?

[Oscaron]

For the last several years, in our campaigns, heavy magic use (i.e. Walking Missile Batteries or Magic saturated areas) cause accumulations of magic causing Magic Poisoning.

Depending on degree and speed of accumulation, differing effects can occur.

We used 'book-keeping' lite rules. Meaning, the DM would only invoke it when needed and didn't keep exact records.

Osc

 

[Geoffrey]

Monte Cook's Book of Vile Darkness has quite a few spells that have unpleasant consequences for the caster.

 

[ColonelHardisson]

Alright, so the thread is 4 years old...but Green Ronin's "True Sorcery" (the magic system from The Black Company setting book) has rules for Taint, which occurs when magic is used for evil.

 

[Angel Tarragon]

Alright, so the thread is 4 years old...but Green Ronin's "True Sorcery" (the magic system from The Black Company setting book) has rules for Taint, which occurs when magic is used for evil.

Heroes of Horror and Unearthed Arcana have taint as well.

 

[Nifft]

Heroes of Horror and Unearthed Arcana have taint as well.

Taint and Sanity have made their way from UA into the d20srd.

-- N

 

[Henry]

Good someone mentioned True Sorcery, which even without the taint has nonlethal damage as fatigue, which is a low-powered "detrimental" effect.

 

[Dioltach]

Magic always corrupts in the Conan RPG.

 

[Angel Tarragon]

Taint and Sanity have made their way from UA into the d20srd.

I know WotC has sanctioned the material as Open Content, but is it really in the SRD?

 

[Sir Brennen]

Doesn't Iron Heroes have some unpleasantness set aside for when the Arcanist class screws up?

None-D20, the core GURPS system used skill checks for spells (roll lower than skill on 3d6), with a roll of 18 being very bad. Accidently summoning demons and the like.

 

[Sir Brennen]

Taint and Sanity have made their way from UA into the d20srd.

I know WotC has sanctioned the material as Open Content, but is it really in the SRD?

Maybe he meant into the www.d20srd.org site.