spell stacking and %

[spellhurler]

OK i have read the rules but my dm and i disagree on the (physics) of the effects. Can the blink, displace self and blur spells stack? The same effect spell says no 50% cant stack with 50% (like invis).However I see it as eg. in the case of blinking creature which can be attacked by a creature with sight. That creature must first succeed in timing % to hit corporal than ...visually discern a displaced creature which is blurred and hit it % and%. I may be displaced but my form is still blurred.
thoughts appreciated

 

[Infiniti2000]

Blur and displacement don't "stack" (and if they did, exactly how multiple types of concealment effects stack would be a separate argument).

Blink is another matter entirely and its difficulty in rapid table adjudication is one reason I dislike the spell. The 50% miss chance itself is not called concealment and therefore may 'stack' with concealment. However, if you can strike ethereal creatures (but not see them), then it says you suffer a concealment penalty, which clearly doesn't stack. Strangely, if you can see ethereal (but can't attack ethereal), you do not suffer the 50-20 miss chance, but a straight 20% miss chance (so what's the other 10% I wonder? but I digress . . .).

Therefore, I would rule that blur and blink do not stack, but someone who can see ethereal may still be affected by the blur and thus suffer the full 50% blink miss chance.

Displacement and blink also do not entirely stack, but the 'concealment' of displacement is greater than the 'concealment' of blink. I see no clear method to combine them since the math doesn't work out well.

 

[spellhurler]

ok makes sense. would blink and displace than also not (stack). A creature capable of attacking ethereal would be visually affected by the displace, but would someone who cant be affected by both?

*by stack i dont mean neccesarily adding the the percentiles together but rather rolling one after the other.

 

[Primitive Screwhead]

Here is how I would handle this one:

Blink's miss chance for being etheral would be based on and odd/even result. Odd and the character has 'blinked' and is etheral, even and the character is corperal. Any miss chance due to concealment {Blur or Displacement} would be the normal percent roll.

This combines the two miss chances into one roll and allows for a description as to why the attack missed.

I would use this as the two miss chances are from different sources, one from concealment and the other from simply not being there.
A character capable of striking both the material and etheral plane could ignore the odd/even miss chance, and a creature with true sight could ignore the % chance due to concealment from either spell.

I would not use seperate rolls for the same source, meaning mulitple miss chances due to different means of concealment. If a character had both Blur and Displacement active, any strike good enough to negate the displacement also negates the blur.


Side note, I like the circular reference in the Blink spell that says to check out the Blink Dog in the MMI...which shows the critter gets a SU ability to use the Blink spell....

 

[Kerrick]

Here's what I did: Made concealment give a straight-up AC bonus and got rid of the miss chance. I mean, really - who wants to roll MORE dice, every time someone attacks you? Not the DM, certainly. I ruled that 20% concealment (blur, partial concealment) grants a +2 unnamed bonus to AC; 50% (full concealment) grants +6. (Yes, I know a 20% miss chance more properly equates to +4, but concealment isn't cover - you can shoot through it.) With them being AC bonuses, they all stack - someone with a blur spell, blinking, in a fog cloud gets a +6 or +10 bonus to AC, depending on how far away he is.

For blink, I'd say you get a flat +2 bonus to AC. The blink should go on its own intiative count - that way, you can tell if a spell you cast, or cast by someone else, will affect you or not without rolling percentage chances. This also means that you can entirely avoid some AoE effects, if you blink before they go off.