Messin' With Metamagic

The problem with messing around with metamagic is that the whole system sort of tries to shoehorn slot-based, skill-independent magic into something that would fit better in either a spell point system or one that required some kind of skill roll for spellcasting.

Metamagic is easy and effective in a point-based system. The metapsionic feats work great, and are much more useful than the metamagic stuff. It just makes more sense there.

I've contemplated requiring a check of some sort to cast a spell metamagicked. I'd either require a Spellcraft roll or a caster level check... not sure which works better. Metamagic feats would have two components - a level adjustment and a DC modifier. The level adjustment would work the same way it does now, with the adjusted spell using up a slot that many levels higher. The DC modifier would change the DC required to successfully cast the metamagicked spell.

A bit of a thought experiment follows.

Say we have Quicken Spell, which might be +2 levels, +8 DC modifier. The formula for the Spellcraft check to cast the metamagicked spell is 15 + the total level of the spell + DC modifier. Under this system, to cast a Quickened Magic Missile, you'd have to roll a Spellcraft check, DC 26 (base 15 + 3 for the modified spell level + 8 for the DC modifier from Quicken Spell). If you make it, the spell goes off fine. If you fail, the slot is wasted. Gritty, cruel or low-magic DMs might institute some sort of critical failure rules.

Conversions of the core metamagic feats might be something like...

Still, Silent : +0 level, +4 DC
Empower : +1 level, +4 DC
Maximize, Quicken : +2 levels, +8 DC

Hmmm. This would make wizards remain the metamagic champs, as they'd get the bonus feats, as well as quicker access to higher-level slots and a better Spellcraft check due to high Int. Clerics would likely be next, though they tend to have fewer skill points. Sorcerers and bards would be flexible due to spontaneous casting, but have a higher chance of messing up, and take longer to cast.

Problems would arise at high levels, though. A smart wizard would put a point into Spellcraft every level, and could easily end up with a +30 Spellcraft roll. Maybe ramp up the modifier based on spell level as it increases?

Arrgh. Enough rambling. This is an interesting thought experiment, and I'm curious to hear what you all think of it, but I have a story to write.
 

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I like this last variant best. As the DMG says, increasing randomness is a penalty to the PCs.

For the DC boost, I'd suggest modelling the increase on "Overcasting" from a scroll, which is (in some sense), equivalent to using the Heighten Spell feat in this system.
 

Kamikaze Midget said:
Well, a prevailing opinion is that Metamagic is generally not worth the effort put into it....

Gosh, I can't disagree more!

My sorcerer *loves* silent spell, still spell and enlarge spell, because it gives her phenomenal tactical flexibility!

However, in the spirit of your question, can I make a positive suggestion for a different way of handling metamagic which might even be considered more typical of many fantasy stories?

Metamagic doesn't increase the spell slot level.

Instead, it introduces a 10% backfire chance per +1 value of the metamagic.

Thus trying to twist spells in unusual ways or force more power into them, or gabbling them off quickly might make them fail or backfire.

Thus attempting to extend a haste once only has a 10% failure chance, while attempting a quickened, maximised fireball has a 70% failure chance.


If you like a nice gentle game it could be the spell simply fails; if you want one with more risk you could treat it like a scroll failure (with a small chance of backfire) and if you want a highly risky situation you could treat any failure as a backfire.

Guess which I'd go for ;)

How does this idea sound? Simple, no additional bookkeeping, adds uncertainty to magic for those willing to take risks...

Cheers
 

I like the spell failure (it should add to arcane spell failure from armor if applicable but shouldn't be reduced by arcane armor feats or abilities)
I might try this + subdual damage equals to the metamagic needed slots.

Chacal
 

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