Valusian House Rule: Improved Invisibility

RJSmalls

First Post
In an effort to get suggestions, critiques, or questions regarding some of the house rules used in our current campaign, I'd like to post them here from time to time. If you have a moment, I'd appreciate reading your thoughts - either positive or negative. Thanks. - RJ

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Valusian House Rule: Improved Invisibility

Invisibility works per the Core Rules in all cases except the following: When a creature is under the effects of an Improved Invisibility spell and takes any offensive action, he is no longer invisible per the Core Rules. Instead, a slight wavering of light indicates his current position and roughly outlines his form. This translucent glimmer affords the creature Concealment and provides a 90% miss chance against any attacks or targeted spells. A creature under this effect provoke AO's as if he were not invisible, though the miss chance still applies.

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Rationale: We got a bit tired of the headaches caused by Improved Invisibility. It's a great 4th level spell and is consistently used by our group's sorceror. We adhered to the Coe Rules and the Sage's advice on handling invisibility, but still felt that the effort required did not correspond with increased fun.

We also had discussions as to what provoked an AO while one was Invisible (drinking a potion, flying silently through a threatened area, etc.) and found it confusing that a creature with 1/2 or more Cover could not be AO'd, but a creature that was Invisible could.

Doubtless, some of our rulings or interpretations of the rules may have been incorrect. And, certainly, invisibility may not cause headaches in your own campaign. This is just based from our experience.

The switch enables us to more quickly progress through combat. It was suggested by the party's sorceror, who stands to lost the most bang for his buck. The 90% was derived from some (very) rough math when trying to ascertain what chance the average creature had of beating a Listen/Spot DC by +20 against an average invisible creature. I can post the math if people are that interested, but I'm sure it's flawed.

Note that Invisibility works per the Core Rules until an offensive action is taken, so we still deal with the "old" +20 DC Spot/Listen stuff until that time.

Bottom line - The above house rule seems to hold the promise of increasing the speed of combat and the enjoyment of those involved, while removing any metagaming fears or problematic rulings.

We like it. Maybe you will, too.

Cheers,
RJ
 

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Murrdox

First Post
Ummm... I don't get it.

Why do you allow a 90% miss chance against the target, when normal invisibility only gives you a 50% miss chance?

In terms of targeting (ie figuring out where the target is) you still need to make spot and/or listen checks.

If you want to make it such that a character with "Improved Invisibilty" cast on him sort of "gives himself away" a bit when he attacks or takes offensive action, then give every creature a circumstance bonus to spot and listen any turn an improved invisibility creature acted.

For example, if your Improved Invisible sorcerer casts a magic missle at an Ogre 30 feet away, then when it's the Ogre's turn, he can make a spot check against a normal DC to spot an invisible opponent, with a +10 circumstance bonus because of the "shimmer" effect.
 

RJSmalls

First Post
Normal invisibility grants a 50% miss chance, but that's after someone has made their Spot/Listen check, or picked "the right square" to attack.

In our (admittedly limited) experience, it's rare for creatures to beat a Move Silently and/or Hide check by 20, hence they aren't able to pinpoint the invisible creature, and never even get the chance to take the 50% miss chance attack.

This way, we remove the cumbersome Listen/Spot checks and go to a straight miss chance that is, indeed, greater than 50% to help off-set the loss of the required checks.

In this system, you do not need to target an Improved Invis creature after he's made an offensive action. You can target him normally, but you suffer a 90% miss chance. It's almost like Blur on steroids. The math works (in that the caster still gets a great benefit from Imp Invis) and yet we've cut out numerous die rolls.

Cheers,
RJ
 

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